Use an explicit failure check for zend_result functions in the scanner (#10688)

Author: nielsdos

Zend/zend_language_scanner.l

@@ -1329,15 +1329,15 @@ static zend_result check_nesting_at_end(void)
 	} while (0)
 
 #define RETURN_EXIT_NESTING_TOKEN(_token) do { \
-		if (exit_nesting(_token) && PARSER_MODE()) { \
+		if (exit_nesting(_token) != SUCCESS && PARSER_MODE()) { \
 			RETURN_TOKEN(T_ERROR); \
 		} else { \
 			RETURN_TOKEN(_token); \
 		} \
 	} while(0)
 
 #define RETURN_END_TOKEN do { \
-		if (check_nesting_at_end() && PARSER_MODE()) { \
+		if (check_nesting_at_end() != SUCCESS && PARSER_MODE()) { \
 			RETURN_TOKEN(T_ERROR); \
 		} else { \
 			RETURN_TOKEN(END); \