Update graphics/giflib to 5.1.4.

Changes:
Version 5.1.4
=============
Code Fixes
----------
* Fix SF bug #94: giflib 5 loves to fail to load images... a LOT.
* Fix SF Bug #92: Fix buffer overread in gifbuild.
* Fix SF Bug #93: Add bounds check in gifbuild netscape2.0 path
* Fix SF Bug #89: Fix buffer overread in gifbuild.

Version 5.1.3
=============
As of this version the library and code has been seriously abused by fuzzers,
smoking out crash bugs (now fixed) induced by various kinds of severely
malformed GIF.

Code Fixes
----------
* Prevent malloc randomess from causing the header output routine to emit
  a GIF89 version string even when no GIF89 features are present. Only
  breaks tests, not production code, but it's odd this wasn't caught sooner.
* Prevent malloc randomess from producing sporadic failures by causing
  sanity checks added in 5.1.2 to misfire.
* Bulletproof gif2rgb against 0-height images. Addressed SF bug #78:
  Heap overflow in gif2rgb with images of size 0, also SF bug #82.
* Remove unnecessary duplicate EGifClose() in gifcolor.c. Fixes SF bug #83
  introduced in 5.1.2.
* Fix SF Bug #84: incorrect return of DGifSlurp().

graphics/giflib/Makefile.common

@@ -1,8 +1,8 @@
-# $NetBSD: Makefile.common,v 1.10 2016/01/18 19:02:56 leot Exp $
+# $NetBSD: Makefile.common,v 1.11 2016/05/01 20:28:44 leot Exp $
 # used by graphics/giflib/Makefile
 # used by graphics/giflib-util/Makefile
 
-DISTNAME=	giflib-5.1.2
+DISTNAME=	giflib-5.1.4
 CATEGORIES=	graphics
 MASTER_SITES=	${MASTER_SITE_SOURCEFORGE:=giflib/}
 EXTRACT_SUFX=	.tar.bz2

graphics/giflib/distinfo

@@ -1,6 +1,6 @@
-$NetBSD: distinfo,v 1.17 2016/01/18 14:34:36 leot Exp $
+$NetBSD: distinfo,v 1.18 2016/05/01 20:28:44 leot Exp $
 
-SHA1 (giflib-5.1.2.tar.bz2) = 3f7bc86280db30a7120b2113f9f261301c515ad2
-RMD160 (giflib-5.1.2.tar.bz2) = 93bb79ca74d8063da74f8597ddec4d6a79bdfd2f
-SHA512 (giflib-5.1.2.tar.bz2) = 062adabd25d8c879d2bd6fd007244efb5c41248f68b75d184d94836d2e5dcbfcb1427928a3bc78017ecb4e679a336178d28851ba1f3c1a40f70e694f3ff8449d
-Size (giflib-5.1.2.tar.bz2) = 638967 bytes
+SHA1 (giflib-5.1.4.tar.bz2) = 5f1157cfc377916280849e247b8e34fa0446513f
+RMD160 (giflib-5.1.4.tar.bz2) = 0a970b30afb113036183a35bf55b7edcfbcc46c8
+SHA512 (giflib-5.1.4.tar.bz2) = 32b5e342056c210e6478e9cb3b6ceec9594dcfaf34feea1eb4dad633a081ed4465bceee578c19165907cb47cb83912ac359ceea666a8e07dbbb5420f9928f96d
+Size (giflib-5.1.4.tar.bz2) = 639703 bytes