fix type issue

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@13457 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_apr.c

@@ -74,7 +74,7 @@ SWITCH_DECLARE(switch_thread_id_t) switch_thread_self(void)
 #ifndef WIN32
 	return apr_os_thread_current();
 #else
-	return (GetCurrentThreadId());
+	return (switch_thread_id_t)(GetCurrentThreadId());
 #endif
 }