[longomatch] Also hide the didactic message when project has 1 media file.

[Andoni Morales Alastruey <amorales src gnome org>]

commit 496d1741c4498a282b022cc454fd636ce36045b4
Author: Julien Moutte <julien fluendo com>
Date:   Wed Mar 18 18:55:07 2015 +0100

    Also hide the didactic message when project has 1 media file.
    
    It might have been visible previously but if the project desc changes we need to hide it explicitely.

 LongoMatch.GUI/Gui/Component/ProjectPeriods.cs |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/LongoMatch.GUI/Gui/Component/ProjectPeriods.cs b/LongoMatch.GUI/Gui/Component/ProjectPeriods.cs
index e563f55..d321a92 100644
--- a/LongoMatch.GUI/Gui/Component/ProjectPeriods.cs
+++ b/LongoMatch.GUI/Gui/Component/ProjectPeriods.cs
@@ -240,6 +240,7 @@ namespace LongoMatch.Gui.Component
                                        // Just in case it was previously visible, a mediafile might still be 
loaded if 
                                        // the user is going back and forth adding/removing files to the set.
                                        HideSecondaryPlayer ();
+                                       HideDidactic ();
                                }
                        }
                }