Remove meanwhile redundant error output of apps/opt_next(void) parsing numbers

Reviewed-by: NMatt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/11998)

apps/lib/opt.c

@@ -740,40 +740,29 @@ int opt_next(void)
             break;
         case 'p':
         case 'n':
-            if (!opt_int(arg, &ival)
-                    || (o->valtype == 'p' && ival <= 0)) {
+            if (!opt_int(arg, &ival))
+                return -1;
+            if (o->valtype == 'p' && ival <= 0) {
                 opt_printf_stderr("%s: Non-positive number \"%s\" for -%s\n",
                                   prog, arg, o->name);
                 return -1;
             }
             break;
         case 'M':
-            if (!opt_imax(arg, &imval)) {
-                opt_printf_stderr("%s: Invalid number \"%s\" for -%s\n",
-                                  prog, arg, o->name);
+            if (!opt_imax(arg, &imval))
                 return -1;
-            }
             break;
         case 'U':
-            if (!opt_umax(arg, &umval)) {
-                opt_printf_stderr("%s: Invalid number \"%s\" for -%s\n",
-                                  prog, arg, o->name);
+            if (!opt_umax(arg, &umval))
                 return -1;
-            }
             break;
         case 'l':
-            if (!opt_long(arg, &lval)) {
-                opt_printf_stderr("%s: Invalid number \"%s\" for -%s\n",
-                                  prog, arg, o->name);
+            if (!opt_long(arg, &lval))
                 return -1;
-            }
             break;
         case 'u':
-            if (!opt_ulong(arg, &ulval)) {
-                opt_printf_stderr("%s: Invalid number \"%s\" for -%s\n",
-                                  prog, arg, o->name);
+            if (!opt_ulong(arg, &ulval))
                 return -1;
-            }
             break;
         case 'c':
         case 'E':