patch 9.0.2019: Vim9: no support for funcrefs

Problem:  Vim9: no support for funcrefs
Solution: Add support for object/class funcref members

closes: #11981 #12417 #12960 #12324 #13333

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>
diff --git a/src/structs.h b/src/structs.h
index 5131858..a221a04 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -2316,6 +2316,7 @@
 
     int		pt_copyID;	// funcstack may contain pointer to partial
     dict_T	*pt_dict;	// dict for "self"
+    object_T	*pt_obj;	// object method
 };
 
 typedef struct {