patch 8.2.4972: Vim9: compilation fails when using dict member when skipping

Problem:    Vim9: compilation fails when using dict member when skipping.
Solution:   Do not generate ISN_USEDICT when skipping. (closes #10433)
diff --git a/src/vim9expr.c b/src/vim9expr.c
index 3375478..eaea089 100644
--- a/src/vim9expr.c
+++ b/src/vim9expr.c
@@ -2102,7 +2102,8 @@
 
     // Turn "dict.Func" into a partial for "Func" bound to "dict".
     // This needs to be done at runtime to be able to check the type.
-    if (keeping_dict && generate_instr(cctx, ISN_USEDICT) == NULL)
+    if (keeping_dict && cctx->ctx_skip != SKIP_YES
+				  && generate_instr(cctx, ISN_USEDICT) == NULL)
 	return FAIL;
 
     return OK;