Allow building with either giflib 4 or 5

svn path=/head/; revision=375489

graphics/imlib2/Makefile

@@ -64,7 +64,7 @@ PLIST_SUB+=	JPEG="@comment "
 .endif
 
 .if ${PORT_OPTIONS:MPNG}
-LIB_DEPENDS+=	libpng15.so:${PORTSDIR}/graphics/png
+LIB_DEPENDS+=	libpng.so:${PORTSDIR}/graphics/png
 PLIST_SUB+=	PNG=""
 .else
 CONFIGURE_ARGS+=	--without-png

graphics/imlib2/files/patch-src_modules_loaders_loader__gif.c

@@ -0,0 +1,14 @@
+--- src/modules/loaders/loader_gif.c.orig	2013-12-21 10:16:10 UTC
++++ src/modules/loaders/loader_gif.c
+@@ -36,7 +36,11 @@ load(ImlibImage * im, ImlibProgressFunct
+ #endif
+    if (fd < 0)
+       return 0;
++#if GIFLIB_MAJOR >= 5
++   gif = DGifOpenFileHandle(fd, NULL);
++#else
+    gif = DGifOpenFileHandle(fd);
++#endif
+    if (!gif)
+      {
+         close(fd);