[client 1/2 v2] streaming: Check the stream id in display_update_stream_report() too

[Francois Gouget <fgouget@xxxxxxxxxxxxxxx>]

It's safer and more consistent than assuming the caller has done the
checks already.

Signed-off-by: Francois Gouget <fgouget@xxxxxxxxxxxxxxx>
---
 src/channel-display.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/channel-display.c b/src/channel-display.c
index cf9c583..b4c9ec0 100644
--- a/src/channel-display.c
+++ b/src/channel-display.c
@@ -1222,9 +1222,16 @@ void stream_display_frame(display_stream *st, SpiceMsgIn *frame_msg,
 static void display_update_stream_report(SpiceDisplayChannel *channel, uint32_t stream_id,
                                          uint32_t frame_time, int32_t latency)
 {
-    display_stream *st = channel->priv->streams[stream_id];
+    SpiceDisplayChannelPrivate *c = channel->priv;
+    display_stream *st;
     guint64 now;
 
+    g_return_if_fail(c != NULL);
+    g_return_if_fail(c->streams != NULL);
+    g_return_if_fail(c->nstreams > stream_id);
+
+    st = channel->priv->streams[stream_id];
+
     if (!st->report_is_active) {
         return;
     }
-- 
2.8.1

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