Zend/Optimizer/zend_optimizer.c: use uint32_t type instead of int

Author: Girgias

Zend/Optimizer/zend_optimizer.c

@@ -869,7 +869,7 @@ const zend_class_constant *zend_fetch_class_const_info(
 	} else if (opline->op1_type == IS_UNUSED
 		&& op_array->scope && !(op_array->scope->ce_flags & ZEND_ACC_TRAIT)
 		&& !(op_array->fn_flags & ZEND_ACC_TRAIT_CLONE)) {
-		int fetch_type = opline->op1.num & ZEND_FETCH_CLASS_MASK;
+		uint32_t fetch_type = opline->op1.num & ZEND_FETCH_CLASS_MASK;
 		if (fetch_type == ZEND_FETCH_CLASS_SELF) {
 			ce = op_array->scope;
 		} else if (fetch_type == ZEND_FETCH_CLASS_STATIC) {