[PATCH] Fixed error when trying to access undefined source buffer without checking it first

[Oliver Gutierrez <ogutierrez@xxxxxxxxxx>]

---
 playback.js | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/playback.js b/playback.js
index 9659381..b5954da 100644
--- a/playback.js
+++ b/playback.js
@@ -107,21 +107,20 @@ SpicePlaybackConn.prototype.process_channel_message = function(msg)
              So we do two things.  First, we seek forward.  Second, we compute how much of a gap
              there would have been, and essentially eliminate it.
         */
+        if (! this.source_buffer)
+            return true;
+
         if (this.last_data_time && data.time >= (this.last_data_time + GAP_DETECTION_THRESHOLD))
         {
             this.skip_until = data.time;
-            this.gap_time = (data.time - this.start_time) - 
+            this.gap_time = (data.time - this.start_time) -
               (this.source_buffer.buffered.end(this.source_buffer.buffered.end.length - 1) * 1000.0).toFixed(0);
         }
 
         this.last_data_time = data.time;
 
-
         DEBUG > 1 && console.log("PlaybackData; time " + data.time + "; length " + data.data.byteLength);
 
-        if (! this.source_buffer)
-            return true;
-
         if (this.start_time == 0)
             this.start_playback(data);
 
-- 
2.7.4

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