Fix i386 release build warning

Author: iluuu1994

.github/workflows/push.yml

@@ -169,7 +169,7 @@ jobs:
         uses: ./.github/actions/configure-x32
         with:
           configurationParameters: >-
-            --enable-debug
+            --disable-debug
             --enable-zts
       - name: make
         run: make -j$(/usr/bin/nproc) >/dev/null

Zend/zend_operators.h

@@ -199,6 +199,9 @@ zend_memnstr(const char *haystack, const char *needle, size_t needle_len, const
 
 		while (p <= end) {
 			if ((p = (const char *)memchr(p, *needle, (end-p+1)))) {
+				/* This assert avoids an object size overflow warning (due to
+				 * needle_len underflowing) in i386 release builds on GCC. */
+				ZEND_ASSERT(needle_len > 1);
 				if (ne == p[needle_len-1] && !memcmp(needle+1, p+1, needle_len-2)) {
 					return p;
 				}