patch 9.1.0542: Vim9: confusing string() output for object functions

Problem:  Vim9: confusing string() output for object functions
Solution: improve the output for object functions (Ernie Rael)

fixes: #15129
closes: #15143

Signed-off-by: Ernie Rael <errael@raelity.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index f9efacf..dffc63c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    542,
+/**/
     541,
 /**/
     540,