Camera: Fix memory Leak

Change-Id: I0345f8af1f3e738be224ab602f2abab19c7a6203
Signed-off-by: Vishal Bhoj <vishal.bhoj@linaro.org>
diff --git a/libcamera/CameraHardware.cpp b/libcamera/CameraHardware.cpp
index 8c90fa4..db5a801 100644
--- a/libcamera/CameraHardware.cpp
+++ b/libcamera/CameraHardware.cpp
@@ -213,6 +213,7 @@
                 //mTimestampFn(timeStamp, CAMERA_MSG_VIDEO_FRAME,mRecordBuffer, mUser);
             }
             mDataFn(CAMERA_MSG_PREVIEW_FRAME,picture,0,NULL,mUser);
+	    picture->release(picture);
 	}
         camera.ReleasePreviewFrame();
     }