graphics/giflib: Update to 5.1.3

- Update MAINTAINER
- Remove patch which is now included upstream

graphics/giflib/Makefile

@@ -2,12 +2,12 @@
 # $FreeBSD$
 
 PORTNAME=	giflib
-PORTVERSION=	5.1.2
-PORTREVISION=	2
+PORTVERSION=	5.1.3
+PORTREVISION=	0
 CATEGORIES=	graphics
 MASTER_SITES=	SF/${PORTNAME}
 
-MAINTAINER=	portmgr@FreeBSD.org
+MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Tools and library routines for working with GIF images
 
 CONFLICTS=	libungif-[0-9]*

graphics/giflib/distinfo

@@ -1,2 +1,2 @@
-SHA256 (giflib-5.1.2.tar.bz2) = 76c0a084c3b02f9315ff937b8be6096186002fea26f33e2123081ba2be6e2a7c
-SIZE (giflib-5.1.2.tar.bz2) = 638967
+SHA256 (giflib-5.1.3.tar.bz2) = 5096d27805283599b01074d487ad3f8e02bd26b84d759b9017be876ca3d5b81d
+SIZE (giflib-5.1.3.tar.bz2) = 639420

graphics/giflib/files/patch-lib_dgif__lib.c

@@ -1,11 +0,0 @@
---- lib/dgif_lib.c.orig	2016-03-06 10:52:49.090426000 +0100
-+++ lib/dgif_lib.c	2016-03-06 10:53:00.938584000 +0100
-@@ -764,7 +764,7 @@
-     BitsPerPixel = CodeSize;
- 
-     /* this can only happen on a severely malformed GIF */
--    if (BitsPerPixel > 8 || Private->RunningBits > 32) {
-+    if (BitsPerPixel > 8) {
- 	GifFile->Error = D_GIF_ERR_READ_FAILED;	/* somewhat bogus error code */
- 	return GIF_ERROR;    /* Failed to read Code size. */
-     }