am ab3977d2: Merge "MetadataRetriever: Check null pointer to avoid tombstone crash."

* commit 'ab3977d21161815c130bdedf21e2571382d208da':
  MetadataRetriever: Check null pointer to avoid tombstone crash.
diff --git a/media/jni/android_media_MediaMetadataRetriever.cpp b/media/jni/android_media_MediaMetadataRetriever.cpp
index 6176f0f..c2694f1 100644
--- a/media/jni/android_media_MediaMetadataRetriever.cpp
+++ b/media/jni/android_media_MediaMetadataRetriever.cpp
@@ -262,6 +262,13 @@
                             width,
                             height,
                             config);
+    if (jBitmap == NULL) {
+        if (env->ExceptionCheck()) {
+            env->ExceptionClear();
+        }
+        ALOGE("getFrameAtTime: create Bitmap failed!");
+        return NULL;
+    }
 
     SkBitmap *bitmap =
             (SkBitmap *) env->GetLongField(jBitmap, fields.nativeBitmap);