Broken dm fix

src/gpu/SkGr.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGr.h"
 
 #include "GrDrawTargetCaps.h"
@@ skipping 217 matching lines @@
         (pixelRef->info().width()  != bm.info().width()) ||
         (pixelRef->info().height() != bm.info().height())) {
         return NULL;
     }
 
     SkYUVPlanesCache::Info yuvInfo;
     SkAutoTUnref<SkCachedData> cachedData(
         SkYUVPlanesCache::FindAndRef(pixelRef->getGenerationID(), &yuvInfo));
 
     void* planes[3];
-    if (cachedData->data()) {
+    if (cachedData && cachedData->data()) {
         planes[0] = (void*)cachedData->data();
         planes[1] = (uint8_t*)planes[0] + yuvInfo.fSizeInMemory[0];
         planes[2] = (uint8_t*)planes[1] + yuvInfo.fSizeInMemory[1];
     } else {
         // Fetch yuv plane sizes for memory allocation. Here, width and height can be
         // rounded up to JPEG block size and be larger than the image's width and height.
         if (!pixelRef->getYUV8Planes(yuvInfo.fSize, NULL, NULL, NULL)) {
             return NULL;
         }
 
@@ skipping 348 matching lines @@
         if (shader->asFragmentProcessor(context, skPaint, viewM, NULL, &paintColor, &fp) && fp) {
             grPaint->addColorProcessor(fp)->unref();
             constantColor = false;
         }
     }
 
     // The grcolor is automatically set when calling asFragmentProcessor.
     // If the shader can be seen as an effect it returns true and adds its effect to the grpaint.
     SkPaint2GrPaintNoShader(context, skPaint, paintColor, constantColor, grPaint);
 }