add generic type to _zend_class_entry

Author: lcarilla

Zend/zend.h

@@ -144,8 +144,16 @@ struct _zend_inheritance_cache_entry {
 	zend_class_entry             *traits_and_interfaces[1];
 };
 
+typedef struct _zend_generic_type {
+	struct _zend_generic_type *elements;
+	size_t element_count;
+	char *type;
+} zend_generic_type;
+
 struct _zend_class_entry {
+  	// TYPE HERE
 	char type;
+	zend_generic_type *generic_type;
 	zend_string *name;
 	/* class_entry or string depending on ZEND_ACC_LINKED */
 	union {