From: John Ellson <ellson@research.att.com>
Date: Tue, 25 Sep 2012 14:09:14 +0000 (-0400)
Subject: fix crash with -Tx11 because X11 device doesn't support layers.
X-Git-Tag: LAST_LIBGRAPH~32^2~299^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7fdf1a8c8834831e677157033b872076b79c2e4a;p=graphviz

fix crash with -Tx11 because X11 device doesn't support layers.
---

diff --git a/lib/common/emit.c b/lib/common/emit.c
index 11e2de9f8..e68446fc3 100644
--- a/lib/common/emit.c
+++ b/lib/common/emit.c
@@ -179,7 +179,7 @@ static void
 layerPagePrefix (GVJ_t* job, agxbuf* xb)
 {
     char buf[128]; /* large enough for 2 decimal 64-bit ints and "page_," */
-    if (job->layerNum > 1) {
+    if (job->layerNum > 1 && (job->flags & GVDEVICE_DOES_LAYERS)) {
 	agxbput (xb, job->gvc->layerIDs[job->layerNum]);
 	agxbputc (xb, '_');
     }