lavu/hwcontext_qsv: Mark a pointer as const.

Silences a warning:
libavutil/hwcontext_qsv.c:912:15: warning: assignment discards 'const' qualifier from pointer target type

1 files changed, 2 insertions, 1 deletions

diff --git a/libavutil/hwcontext_qsv.c b/libavutil/hwcontext_qsv.c
index b6d8bfe2bf..8f9838d7d8 100644
--- a/libavutil/hwcontext_qsv.c
+++ b/libavutil/hwcontext_qsv.c
@@ -863,7 +863,8 @@ static int qsv_transfer_data_to(AVHWFramesContext *ctx, AVFrame *dst,
     mfxStatus err;
     int ret = 0;
     /* make a copy if the input is not padded as libmfx requires */
-    AVFrame tmp_frame, *src_frame;
+    AVFrame tmp_frame;
+    const AVFrame *src_frame;
     int realigned = 0;