Merge commit '21733b39'

* commit '21733b39':
  lavu/qsv: fix a random hwupload failure regression

Fixes CID #1439585.
Merged-by: Mark Thompson <sw@jkqxz.net>

libavutil/hwcontext_qsv.c

@@ -833,7 +833,7 @@ static int qsv_transfer_data_to(AVHWFramesContext *ctx, AVFrame *dst,
 
     mfxSyncPoint sync = NULL;
     mfxStatus err;
-    int ret;
+    int ret = 0;
 
     while (!s->session_upload_init && !s->session_upload && !ret) {
 #if HAVE_PTHREADS