Fix build breakage caused by giflib update

Change-Id: I225c29f321e75bf2813c389ae3b7e9e888daa3cf
diff --git a/jni/GifTranscoder.cpp b/jni/GifTranscoder.cpp
index 44fa30c..1f329f7 100644
--- a/jni/GifTranscoder.cpp
+++ b/jni/GifTranscoder.cpp
@@ -498,11 +498,11 @@
 
 GifFilesCloser::~GifFilesCloser() {
     if (mGifIn) {
-        DGifCloseFile(mGifIn);
+        DGifCloseFile(mGifIn, NULL);
         mGifIn = NULL;
     }
     if (mGifOut) {
-        EGifCloseFile(mGifOut);
+        EGifCloseFile(mGifOut, NULL);
         mGifOut = NULL;
     }
 }