libsaria: I missed some references to thread.py

These should be removed.  I don't know how I missed this up until this
point

libsaria/sources/__init__.py

@@ -3,7 +3,6 @@
 import libsaria
 exists  = libsaria.path.exists
 expand  = libsaria.path.expand
-from libsaria import threads
 
 import library
 import playlist

libsaria/sources/library.py

@@ -3,8 +3,8 @@
 import libsaria
 import libsaria.sources
 import libsaria.path.files
-from libsaria import threads
 splitext  = libsaria.path.splitext
+import threading
 
 from libsaria.trees import *
 from index import Index
@@ -25,7 +25,7 @@ source    = None
 ttable    = None
 
 cur_id   = -1
-lib_lock = threads.get_mutex("library")
+lib_lock = threading.Lock()
 loaded   = False
 filtered = False
 badfiles = set()