patch 8.1.0233: "safe" argument of call_vim_function() is always FALSE

Problem:    "safe" argument of call_vim_function() is always FALSE.
Solution:   Remove the argument.
diff --git a/src/version.c b/src/version.c
index 64aa76a..6e6c3cd 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    233,
+/**/
     232,
 /**/
     231,