[f-spot] Use F-Spot's default size as the default for view mode too

[Ruben Vermeersch <rubenv src gnome org>]

commit 69efa72ec134dc81b15887253744ede6e4ec8e2f
Author: Iain Lane <laney ubuntu com>
Date:   Sat Jun 26 23:32:04 2010 +0100

    Use F-Spot's default size as the default for view mode too
    
    If the view mode height and width are unset, fall back to using the
    default height and width (from the glade file).
    
    Original patch from Gary Ching-Pang Lin.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=609406

 src/SingleView.cs |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/src/SingleView.cs b/src/SingleView.cs
index ec5d156..ccc9b4a 100644
--- a/src/SingleView.cs
+++ b/src/SingleView.cs
@@ -530,8 +530,14 @@ namespace FSpot {
 
 			case Preferences.VIEWER_WIDTH:
 			case Preferences.VIEWER_HEIGHT:
-				Window.SetDefaultSize(Preferences.Get<int> (Preferences.VIEWER_WIDTH),
-						      Preferences.Get<int> (Preferences.VIEWER_HEIGHT));
+				int width, height;
+				width = Preferences.Get<int> (Preferences.VIEWER_WIDTH);
+				height = Preferences.Get<int> (Preferences.VIEWER_HEIGHT);
+
+				if( width == 0 || height == 0 )
+					break;
+
+				Window.SetDefaultSize(width, height);
 
 				Window.ReshowWithInitialSize();
 				break;