patch 9.0.1942: Vim9: execution stack invalidated with null object

Problem:  Vim9: execution stack invalidated with null object
Solution: Check for a null object before adjusting the execution stack

closes: #13186

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>
diff --git a/src/version.c b/src/version.c
index 168c10c..e48c564 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1942,
+/**/
     1941,
 /**/
     1940,