patch 8.0.0505: failed window split for :stag not handledv8.0.0505

Problem:    Failed window split for :stag not handled. (Coverity CID 99204)
Solution:   If the split fails skip to the end. (bstaletic, closes #1577)

1 files changed, 6 insertions, 2 deletions

diff --git a/src/tag.c b/src/tag.c
index 7710135fa..e2795b805 100644
--- a/src/tag.c
+++ b/src/tag.c
@@ -3203,8 +3203,12 @@ jumpto_tag(
      * open a new tab page. */
     if (postponed_split || cmdmod.tab != 0)
     {
-	win_split(postponed_split > 0 ? postponed_split : 0,
-						       postponed_split_flags);
+	if (win_split(postponed_split > 0 ? postponed_split : 0,
+						postponed_split_flags) == FAIL)
+	{
+	    --RedrawingDisabled;
+	    goto erret;
+	}
 	RESET_BINDING(curwin);
     }
 #endif