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/normal.c b/src/normal.c
index f3cd664..41c7623 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -2248,7 +2248,7 @@
 	virtual_op = MAYBE;
 # endif
 
-	(void)call_func_retnr(p_opfunc, 1, argv, FALSE);
+	(void)call_func_retnr(p_opfunc, 1, argv);
 
 # ifdef FEAT_VIRTUALEDIT
 	virtual_op = save_virtual_op;