[longomatch] Retry taking snapshot 3 times

[Andoni Morales Alastruey <amorales src gnome org>]

commit 205cec4980df81f45417bea6387af820ef6c11d3
Author: Andoni Morales Alastruey <ylatuya gmail com>
Date:   Tue Feb 3 16:07:10 2015 +0100

    Retry taking snapshot 3 times

 LongoMatch.Multimedia/Player/GstPlayer.cs |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)
---
diff --git a/LongoMatch.Multimedia/Player/GstPlayer.cs b/LongoMatch.Multimedia/Player/GstPlayer.cs
index c01c699..68310f7 100644
--- a/LongoMatch.Multimedia/Player/GstPlayer.cs
+++ b/LongoMatch.Multimedia/Player/GstPlayer.cs
@@ -534,9 +534,18 @@ namespace LongoMatch.Video.Player
                
                public Image GetFrame (Time pos, bool accurate, int outwidth=-1, int outheight=-1)
                {
+                       Image img = null;
+                       
                        Seek (pos, accurate, false);
                        Pause ();
-                       return GetCurrentFrame (outwidth, outheight);
+                       for (int i=0; i < 3; i++) {
+                               img = GetCurrentFrame (outwidth, outheight);
+                               if (img != null) {
+                                       break;
+                               }
+                               System.Threading.Thread.Sleep (10);
+                       }
+                       return img;
                }
        }
 }