Bug fix #244: Build failure with -DDEBUG_EVENTS

Fix build failure with -DDEBUG_EVENTS, caused by incorrect references to
X Sync macros. Thanks to blueyed for reporting. (#244)
(cherry picked from commit 6219569d6c)

twin/compton-tde/compton.c

@@ -4595,8 +4595,8 @@ ev_name(session_t *ps, XEvent *ev) {
   if (ps->xsync_exists) {
     int o = ev->type - ps->xsync_event;
     switch (o) {
-      CASESTRRET(CounterNotify);
-      CASESTRRET(AlarmNotify);
+      CASESTRRET(XSyncCounterNotify);
+      CASESTRRET(XSyncAlarmNotify);
     }
   }
 #endif