patch 9.0.1944: Vim9: function instruction pointer invalidated

Problem:  Vim9: function instruction pointer invalidated
Solution: Use the funcref index instead of the instruction pointer

closes: #13178
closes: #13196

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 6543bd2..ddf9a74 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1944,
+/**/
     1943,
 /**/
     1942,