Fix OGG recognition for 64 bit

Change-Id: I4cef86ca05e06f508929d109a52e375169c33bf9
diff --git a/media/libmediaplayerservice/MediaPlayerFactory.cpp b/media/libmediaplayerservice/MediaPlayerFactory.cpp
index 74e5013..9b239b1 100644
--- a/media/libmediaplayerservice/MediaPlayerFactory.cpp
+++ b/media/libmediaplayerservice/MediaPlayerFactory.cpp
@@ -186,7 +186,7 @@
         read(fd, buf, sizeof(buf));
         lseek(fd, offset, SEEK_SET);
 
-        long ident = *((long*)buf);
+        uint32_t ident = *((uint32_t*)buf);
 
         // Ogg vorbis?
         if (ident == 0x5367674f) // 'OggS'