[longomatch] Minor comments and safety checks.

[Andoni Morales Alastruey <amorales src gnome org>]

commit 1412477c34f2b1b8304b6b1c12fb0042e3f62ecb
Author: Julien Moutte <julien fluendo com>
Date:   Sat Mar 14 09:42:42 2015 +0100

    Minor comments and safety checks.

 LongoMatch.GUI/Gui/Component/ProjectPeriods.cs |   12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/LongoMatch.GUI/Gui/Component/ProjectPeriods.cs b/LongoMatch.GUI/Gui/Component/ProjectPeriods.cs
index bcccfe6..44a8858 100644
--- a/LongoMatch.GUI/Gui/Component/ProjectPeriods.cs
+++ b/LongoMatch.GUI/Gui/Component/ProjectPeriods.cs
@@ -140,8 +140,12 @@ namespace LongoMatch.Gui.Component
 
                public void Pause ()
                {
-                       main_cam_playerbin.Pause ();
-                       sec_cam_playerbin.Pause ();
+                       if (main_cam_playerbin.Opened) {
+                               main_cam_playerbin.Pause ();
+                       }
+                       if (sec_cam_playerbin.Opened) {
+                               sec_cam_playerbin.Pause ();
+                       }
                }
 
                public void Seek (Time time, bool accurate)
@@ -183,10 +187,12 @@ namespace LongoMatch.Gui.Component
                                gamePeriods = value.Dashboard.GamePeriods;
 
                                MediaFileSet fileSet = project.Description.FileSet;
-                               file = fileSet.FirstOrDefault ();
                                start = new Time (0);
+                               // FIXME: What should we do if the fileset is empty ?
+                               file = fileSet.FirstOrDefault ();
                                duration = file.Duration;
                                pDuration = new Time (duration.MSeconds / gamePeriods.Count);
+                               // If no periods are provided create from dashboard
                                if (project.Periods == null || project.Periods.Count == 0) {
                                        periods = new List<Period> ();
                                        gamePeriods = value.Dashboard.GamePeriods;