Fix library imports in synctex script

As you mentioned in IRC, the imports for gobject weren't up-to-date.

share/synctex-katarakt-vim.py

@@ -63,7 +63,7 @@ Hint: VIM configuration:
 
 
 
-import gobject
+from gi.repository.GObject import MainLoop, threads_init
 import sys
 import dbus
 import dbus.service
@@ -78,7 +78,7 @@ from dbus.mainloop.glib import DBusGMainLoop
 # tell dbus that we use the gobject main loop
 
 DBusGMainLoop(set_as_default=True)
-loop = gobject.MainLoop()
+loop = MainLoop()
 
 
 #########################################
@@ -202,6 +202,6 @@ thread.start()
 
 # enable threads again, otherwise the quit_if_pdf_exits-thread will not be
 # executed
-gobject.threads_init()
+threads_init()
 loop.run()