Index: gif2tiff.c
===================================================================
RCS file: /cvs/maptools/cvsroot/libtiff/tools/gif2tiff.c,v
retrieving revision 1.12
diff -u -r1.12 gif2tiff.c
--- tools/gif2tiff.c	15 Dec 2010 00:22:44 -0000	1.12
+++ tools/gif2tiff.c	14 Aug 2013 04:43:31 -0000
@@ -280,6 +280,10 @@
         fprintf(stderr, "no colormap present for image\n");
         return (0);
     }
+    if (width == 0 || height == 0) {
+        fprintf(stderr, "Invalid value of width or height\n");
+        return(0);
+    }
     if ((raster = (unsigned char*) _TIFFmalloc(width*height+EXTRAFUDGE)) == NULL) {
         fprintf(stderr, "not enough memory for image\n");
         return (0);