Zend: Convert _zend_op_array.cache_size field to uint32_t

Author: Girgias

Zend/zend_compile.h

@@ -530,9 +530,9 @@ struct _zend_op_array {
 	const zend_property_info *prop_info; /* The corresponding prop_info if this is a hook. */
 	/* END of common elements */
 
-	int cache_size;     /* number of run_time_cache_slots * sizeof(void*) */
-	int last_var;       /* number of CV variables */
-	uint32_t last;      /* number of opcodes */
+	uint32_t cache_size; /* number of run_time_cache_slots * sizeof(void*) */
+	int last_var;        /* number of CV variables */
+	uint32_t last;       /* number of opcodes */
 
 	zend_op *opcodes;
 	ZEND_MAP_PTR_DEF(HashTable *, static_variables_ptr);