Make the -o option actually terminate.

Change-Id: I91b70ee5c3e1fc9b8bb645e219af296867692e65
diff --git a/cmds/stagefright/stagefright.cpp b/cmds/stagefright/stagefright.cpp
index b838f32..94086fa 100644
--- a/cmds/stagefright/stagefright.cpp
+++ b/cmds/stagefright/stagefright.cpp
@@ -85,6 +85,7 @@
     if (gPlaybackAudio) {
         AudioPlayer *player = new AudioPlayer(NULL);
         player->setSource(rawSource);
+        rawSource.clear();
 
         player->start(true /* sourceAlreadyStarted */);
 
@@ -95,6 +96,8 @@
 
         delete player;
         player = NULL;
+
+        return;
     } else if (gReproduceBug >= 3 && gReproduceBug <= 5) {
         int64_t durationUs;
         CHECK(meta->findInt64(kKeyDuration, &durationUs));