patch 8.2.0566: Vim9: variable can be used uninitialized

Problem:    Vim9: variable can be used uninitialized.
Solution:   Jump to after where variable is used.
diff --git a/src/version.c b/src/version.c
index 2e2a4d0..35f8df8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    566,
+/**/
     565,
 /**/
     564,
diff --git a/src/vim9execute.c b/src/vim9execute.c
index 4ac760e..cddb9d2 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -524,7 +524,7 @@
 	else
 	    argc -= vararg_count;
 	if (exe_newlist(vararg_count, &ectx) == FAIL)
-	    goto failed;
+	    goto failed_early;
 	if (defcount > 0)
 	    // Move varargs list to below missing default arguments.
 	    *STACK_TV_BOT(defcount- 1) = *STACK_TV_BOT(-1);
@@ -1773,7 +1773,7 @@
     // When failed need to unwind the call stack.
     while (ectx.ec_frame != initial_frame_ptr)
 	func_return(&ectx);
-
+failed_early:
     for (idx = 0; idx < ectx.ec_stack.ga_len; ++idx)
 	clear_tv(STACK_TV(idx));
     vim_free(ectx.ec_stack.ga_data);