stagefright: warnings be gone, some are now errors, use clang

Change-Id: I81f438ae444f04c12ae27ae4ef6d073033de172c
diff --git a/include/media/IMediaPlayer.h b/include/media/IMediaPlayer.h
index 17ef489..df6130d 100644
--- a/include/media/IMediaPlayer.h
+++ b/include/media/IMediaPlayer.h
@@ -32,7 +32,7 @@
 class Parcel;
 class Surface;
 class IDataSource;
-class IStreamSource;
+struct IStreamSource;
 class IGraphicBufferProducer;
 struct IMediaHTTPService;