Fix GIF transparency.

src/images/SkImageDecoder_libgif.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColor.h"
 #include "SkColorPriv.h"
 #include "SkColorTable.h"
@@ skipping 459 matching lines @@
 #endif
                 return error_return(*bm, "DGifGetExtension");
             }
 
             while (extData != NULL) {
                 /* Create an extension block with our data */
 #if GIFLIB_MAJOR < 5
                 if (AddExtensionBlock(&temp_save, extData[0],
                                       &extData[1]) == GIF_ERROR) {
 #else
-                if (GifAddExtensionBlock(&gif->ExtensionBlockCount,
-                                         &gif->ExtensionBlocks,
+                if (GifAddExtensionBlock(&temp_save.ExtensionBlockCount,
+                                         &temp_save.ExtensionBlocks,
                                          extFunction,
                                          extData[0],
                                          &extData[1]) == GIF_ERROR) {
 #endif
                     return error_return(*bm, "AddExtensionBlock");
                 }
                 if (DGifGetExtensionNext(gif, &extData) == GIF_ERROR) {
                     return error_return(*bm, "DGifGetExtensionNext");
                 }
 #if GIFLIB_MAJOR < 5
@@ skipping 40 matching lines @@
 static SkImageDecoder_DecodeReg gReg(sk_libgif_dfactory);
 
 static SkImageDecoder::Format get_format_gif(SkStreamRewindable* stream) {
     if (is_gif(stream)) {
         return SkImageDecoder::kGIF_Format;
     }
     return SkImageDecoder::kUnknown_Format;
 }
 
 static SkImageDecoder_FormatReg gFormatReg(get_format_gif);