[gs-cvs] rev 8395 - trunk/gs/src

[henrys at ghostscript.com]

Author: henrys
Date: 2007-11-20 22:10:53 -0800 (Tue, 20 Nov 2007)
New Revision: 8395

Modified:
   trunk/gs/src/gdevp14.c
Log:
Check that a device halftone exists before writing it.  Fixes
segmentation fault in xps.  No differences expected.


Modified: trunk/gs/src/gdevp14.c
===================================================================
--- trunk/gs/src/gdevp14.c	2007-11-21 05:57:23 UTC (rev 8394)
+++ trunk/gs/src/gdevp14.c	2007-11-21 06:10:53 UTC (rev 8395)
@@ -4186,8 +4186,9 @@
 	     * Ensure that the tranfer functions, etc.  are current before we
 	     * dump our transparency image to the output device.
 	     */
-	    code = cmd_put_halftone((gx_device_clist_writer *)
-			(((pdf14_clist_device *)dev)->target), pis->dev_ht);
+            if (pis->dev_ht)
+                code = cmd_put_halftone((gx_device_clist_writer *)
+                              (((pdf14_clist_device *)dev)->target), pis->dev_ht);
 	    break;
 	default:
 	    break;		/* do nothing for remaining ops */