Fix build
am: 48caffe6fe

Change-Id: Ib1aa7ab1b874bbf44a90f8a1d8d36bbd8d242a88
diff --git a/cmds/stagefright/stream.cpp b/cmds/stagefright/stream.cpp
index 0294115..3c4187d 100644
--- a/cmds/stagefright/stream.cpp
+++ b/cmds/stagefright/stream.cpp
@@ -182,8 +182,8 @@
             continue;
         }
 
-        sp<IMediaSource> track = extractor->getTrack(i);
-        if (track == nullptr) {
+        sp<MediaSource> track = extractor->getTrack(i);
+        if (track == NULL) {
             fprintf(stderr, "skip NULL track %zu, total tracks %zu\n", i, numTracks);
             continue;
         }