Fix path errors when adding torrents externally in Windows

ChangeLog

@@ -1,3 +1,7 @@
+=== Deluge 1.2.0_rc2 (In Development) ===
+==== GtkUI ====
+  * Fix path errors when adding torrents externally in Windows
+  
 === Deluge 1.2.0_rc1 (07 October 2009) ===
 ==== Core ====
   * Implement new RPC protocol DelugeRPC replacing XMLRPC

deluge/ui/gtkui/ipcinterface.py

@@ -70,7 +70,8 @@ class IPCInterface(component.Component):
         # Make the args absolute paths
         _args = []
         for arg in args:
-            _args.append(os.path.abspath(arg))
+            if arg.strip():
+                _args.append(os.path.abspath(arg))
         args = _args
 
         socket = os.path.join(deluge.configmanager.get_config_dir("ipc"), "deluge-gtk")