Fix NULL dereference in giftext.

From: William Yodlowsky <bsd@openbsd.rutgers.edu>

graphics/libungif/Makefile

@@ -1,8 +1,9 @@
-# $OpenBSD: Makefile,v 1.13 2006/01/08 00:29:38 steven Exp $
+# $OpenBSD: Makefile,v 1.14 2006/10/19 13:26:40 naddy Exp $
 
 COMMENT=	"tools and library routines for working with GIF images"
 
 DISTNAME=	libungif-4.1.4
+PKGNAME=	${DISTNAME}p0
 SHARED_LIBS=	gif	5.4 \
 		ungif	5.4
 CATEGORIES=	graphics

graphics/libungif/patches/patch-util_giftext_c

@@ -0,0 +1,12 @@
+$OpenBSD: patch-util_giftext_c,v 1.1 2006/10/19 13:26:40 naddy Exp $
+--- util/giftext.c.orig	Thu Oct 19 15:11:42 2006
++++ util/giftext.c	Thu Oct 19 15:12:18 2006
+@@ -135,7 +135,7 @@ int main(int argc, char **argv)
+ 	       GifFileName, GifFile->SWidth, GifFile->SHeight);
+ 	printf("\tColorResolution = %d, BitsPerPixel = %d, BackGround = %d.\n",
+ 	       GifFile->SColorResolution,
+-	       GifFile->SColorMap->BitsPerPixel,
++	       GifFile->SColorMap?GifFile->SColorMap->BitsPerPixel:0,
+ 	       GifFile->SBackGroundColor);
+ 	if (GifFile->SColorMap)
+ 	    printf("\tHas Global Color Map.\n\n");