Cleanup the EVP_MD_CTX before exit rather than after

Reviewed-by: NMatt Caswell <matt@openssl.org>

test/sha1test.c

@@ -136,8 +136,8 @@ int main(int argc, char *argv[])
     if (err)
         printf("ERROR: %d\n", err);
 #endif
-    EXIT(err);
     EVP_MD_CTX_free(c);
+    EXIT(err);
     return (0);
 }