patch 9.1.0952: Vim9: missing type checking for any type assignment

Problem:  Vim9: missing type checking for any type assignment
          (Ernie Rael)
Solution: when assigning to a list item, if the type of the LHS item is
          any, then use the list item type (Yegappan Lakshmanan)

fixes: #15208
closes: #16274

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/structs.h

@@ -4692,6 +4692,7 @@ typedef struct lval_S
     int		ll_oi;		// The object/class member index
     int		ll_is_root;	// TRUE if ll_tv is the lval_root, like a
 				// plain object/class. ll_tv is variable.
+    garray_T	ll_type_list;   // list of pointers to allocated types
 } lval_T;
 
 /**