Fix memory leak

Change-Id: Id691f9b32f9daeb23a01b17c5418b4d74a294cda
diff --git a/media/jni/soundpool/SoundPool.cpp b/media/jni/soundpool/SoundPool.cpp
index a8b91d2..a73209b 100644
--- a/media/jni/soundpool/SoundPool.cpp
+++ b/media/jni/soundpool/SoundPool.cpp
@@ -484,6 +484,7 @@
     status_t err = AMediaExtractor_setDataSourceFd(ex, fd, offset, length);
 
     if (err != AMEDIA_OK) {
+        AMediaExtractor_delete(ex);
         return err;
     }