[banshee] LibraryWatcher: Guard against blank or non-existent dirs

[Gabriel Burt <gburt src gnome org>]

commit a3ee4f799449f946849b08c204a2ca41451ec93b
Author: Gabriel Burt <gabriel burt gmail com>
Date:   Tue Mar 22 10:32:35 2011 -0500

    LibraryWatcher: Guard against blank or non-existent dirs

 .../Banshee.LibraryWatcher/SourceWatcher.cs        |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/src/Extensions/Banshee.LibraryWatcher/Banshee.LibraryWatcher/SourceWatcher.cs b/src/Extensions/Banshee.LibraryWatcher/Banshee.LibraryWatcher/SourceWatcher.cs
index 94185fd..bb146cc 100644
--- a/src/Extensions/Banshee.LibraryWatcher/Banshee.LibraryWatcher/SourceWatcher.cs
+++ b/src/Extensions/Banshee.LibraryWatcher/Banshee.LibraryWatcher/SourceWatcher.cs
@@ -75,6 +75,10 @@ namespace Banshee.LibraryWatcher
             this.library = library;
             handle = new ManualResetEvent(false);
             string path = library.BaseDirectoryWithSeparator;
+            if (String.IsNullOrEmpty (path)) {
+                throw new Exception ("Will not create LibraryWatcher for the blank directory");
+            }
+
             string home = Environment.GetFolderPath (Environment.SpecialFolder.Personal) + Path.DirectorySeparatorChar;
             if (path == home) {
                 throw new Exception ("Will not create LibraryWatcher for the entire home directory");
@@ -85,6 +89,10 @@ namespace Banshee.LibraryWatcher
                 throw new Exception ("Will not create LibraryWatcher for the entire root directory");
             }
 
+            if (!Banshee.IO.Directory.Exists (path)) {
+                throw new Exception ("Will not create LibraryWatcher for non-existent directory");
+            }
+
             import_manager = ServiceManager.Get<LibraryImportManager> ();
 
             watcher = new FileSystemWatcher (path);