patch 7.4.1976
Problem:    Number variables are not 64 bits while they could be.
Solution:   Add the num64 feature. (Ken Takata)
diff --git a/src/fileio.c b/src/fileio.c
index 1304190..621281e 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -9481,7 +9481,7 @@
 
 #ifdef FEAT_EVAL
 	/* set v:cmdarg (only when there is a matching pattern) */
-	save_cmdbang = get_vim_var_nr(VV_CMDBANG);
+	save_cmdbang = (long)get_vim_var_nr(VV_CMDBANG);
 	if (eap != NULL)
 	{
 	    save_cmdarg = set_cmdarg(eap, NULL);