fixed gnu warnings

src/libCom/timer/osiTimer.cpp

@@ -353,7 +353,7 @@ void osiTimer::show (unsigned level) const
 {
 	epicsTime	cur = epicsTime::getCurrent ();
 	printf ("osiTimer at %p for \"%s\" with again = %d\n", 
-		this, this->name(), this->again());
+		static_cast <const void *> (this), this->name(), this->again());
 	if (level>=1u) {
 	    double delay = this->exp - cur;
 		printf ("\tdelay to expire = %f, state = %d\n", 

src/libCom/timer/timerQueueThreaded.cpp

@@ -99,7 +99,8 @@ void timerQueueThreaded::reschedule ()
 
 void timerQueueThreaded::show ( unsigned int level ) const
 {
-    printf ( "EPICS threaded timer queue at %p\n", this );
+    printf ( "EPICS threaded timer queue at %p\n", 
+        static_cast <const void *> ( this ) );
     if ( level >=1u ) {
         this->queue.show ( level - 1u );
         printf ( "reschedule event\n" );