[ec/ecp_nistp*.c] restyle: use {} around `else` too

Reviewed-by: NMatt Caswell <matt@openssl.org>
Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/9511)

(cherry picked from commit 4fe2ee3a449a8ca2886584e221f34ff0ef5de119)

crypto/ec/ecp_nistp224.c

@@ -1463,14 +1463,12 @@ int ec_GFp_nistp224_points_mul(const EC_GROUP *group, EC_POINT *r,
          * i.e., they contribute nothing to the linear combination
          */
         for (i = 0; i < num_points; ++i) {
-            if (i == num)
+            if (i == num) {
                 /* the generator */
-            {
                 p = EC_GROUP_get0_generator(group);
                 p_scalar = scalar;
-            } else
+            } else {
                 /* the i^th point */
-            {
                 p = points[i];
                 p_scalar = scalars[i];
             }
@@ -1539,18 +1537,20 @@ int ec_GFp_nistp224_points_mul(const EC_GROUP *group, EC_POINT *r,
                 goto err;
             }
             num_bytes = BN_bn2lebinpad(tmp_scalar, g_secret, sizeof(g_secret));
-        } else
+        } else {
             num_bytes = BN_bn2lebinpad(scalar, g_secret, sizeof(g_secret));
+        }
         /* do the multiplication with generator precomputation */
         batch_mul(x_out, y_out, z_out,
                   (const felem_bytearray(*))secrets, num_points,
                   g_secret,
                   mixed, (const felem(*)[17][3])pre_comp, g_pre_comp);
-    } else
+    } else {
         /* do the multiplication without generator precomputation */
         batch_mul(x_out, y_out, z_out,
                   (const felem_bytearray(*))secrets, num_points,
                   NULL, mixed, (const felem(*)[17][3])pre_comp, NULL);
+    }
     /* reduce the output to its unique minimal representation */
     felem_contract(x_in, x_out);
     felem_contract(y_in, y_out);

crypto/ec/ecp_nistp256.c

@@ -2088,17 +2088,15 @@ int ec_GFp_nistp256_points_mul(const EC_GROUP *group, EC_POINT *r,
         memset(secrets, 0, sizeof(*secrets) * num_points);
         memset(pre_comp, 0, sizeof(*pre_comp) * num_points);
         for (i = 0; i < num_points; ++i) {
-            if (i == num)
+            if (i == num) {
                 /*
                  * we didn't have a valid precomputation, so we pick the
                  * generator
                  */
-            {
                 p = EC_GROUP_get0_generator(group);
                 p_scalar = scalar;
-            } else
+            } else {
                 /* the i^th point */
-            {
                 p = points[i];
                 p_scalar = scalars[i];
             }
@@ -2169,18 +2167,20 @@ int ec_GFp_nistp256_points_mul(const EC_GROUP *group, EC_POINT *r,
                 goto err;
             }
             num_bytes = BN_bn2lebinpad(tmp_scalar, g_secret, sizeof(g_secret));
-        } else
+        } else {
             num_bytes = BN_bn2lebinpad(scalar, g_secret, sizeof(g_secret));
+        }
         /* do the multiplication with generator precomputation */
         batch_mul(x_out, y_out, z_out,
                   (const felem_bytearray(*))secrets, num_points,
                   g_secret,
                   mixed, (const smallfelem(*)[17][3])pre_comp, g_pre_comp);
-    } else
+    } else {
         /* do the multiplication without generator precomputation */
         batch_mul(x_out, y_out, z_out,
                   (const felem_bytearray(*))secrets, num_points,
                   NULL, mixed, (const smallfelem(*)[17][3])pre_comp, NULL);
+    }
     /* reduce the output to its unique minimal representation */
     felem_contract(x_in, x_out);
     felem_contract(y_in, y_out);

crypto/ec/ecp_nistp521.c

@@ -1928,17 +1928,15 @@ int ec_GFp_nistp521_points_mul(const EC_GROUP *group, EC_POINT *r,
          * i.e., they contribute nothing to the linear combination
          */
         for (i = 0; i < num_points; ++i) {
-            if (i == num)
+            if (i == num) {
                 /*
                  * we didn't have a valid precomputation, so we pick the
                  * generator
                  */
-            {
                 p = EC_GROUP_get0_generator(group);
                 p_scalar = scalar;
-            } else
+            } else {
                 /* the i^th point */
-            {
                 p = points[i];
                 p_scalar = scalars[i];
             }
@@ -2007,19 +2005,21 @@ int ec_GFp_nistp521_points_mul(const EC_GROUP *group, EC_POINT *r,
                 goto err;
             }
             num_bytes = BN_bn2lebinpad(tmp_scalar, g_secret, sizeof(g_secret));
-        } else
+        } else {
             num_bytes = BN_bn2lebinpad(scalar, g_secret, sizeof(g_secret));
+        }
         /* do the multiplication with generator precomputation */
         batch_mul(x_out, y_out, z_out,
                   (const felem_bytearray(*))secrets, num_points,
                   g_secret,
                   mixed, (const felem(*)[17][3])pre_comp,
                   (const felem(*)[3])g_pre_comp);
-    } else
+    } else {
         /* do the multiplication without generator precomputation */
         batch_mul(x_out, y_out, z_out,
                   (const felem_bytearray(*))secrets, num_points,
                   NULL, mixed, (const felem(*)[17][3])pre_comp, NULL);
+    }
     /* reduce the output to its unique minimal representation */
     felem_contract(x_in, x_out);
     felem_contract(y_in, y_out);