Filechooser callback in background

We should call the filechooser callback in the background so that gdk
threads have a chance to unlock and prevent deadlock.

ocarina/fsselect.py

@@ -3,7 +3,10 @@
 import ocarina
 import gobject
 import os
-gtk = ocarina.gtk
+
+gtk      = ocarina.gtk
+libsaria = ocarina.libsaria
+threads  = libsaria.threads
 
 #FS_OK = gobject.signal_new("filesystem_ok", gtk.FileChooserDialog,
 #		gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
@@ -57,7 +60,7 @@ def select_path(widget, callback):
 	if uri[:7] == "file://":
 		uri = uri[7:]
 	uri = uri.replace("%20", " ")
-	callback(uri)
+	threads.background(callback, uri)
 
 def run_chooser2(callback):
 	make_chooser2("title", callback)