Missing prototype

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@12252 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/dialplans/mod_dialplan_directory/mod_dialplan_directory.c

@@ -35,6 +35,7 @@
 #include <fcntl.h>
 
 SWITCH_MODULE_LOAD_FUNCTION(mod_dialplan_directory_load);
+SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_dialplan_directory_shutdown);
 SWITCH_MODULE_DEFINITION(mod_dialplan_directory, mod_dialplan_directory_load, mod_dialplan_directory_shutdown, NULL);
 
 static struct {