revert to using virtual destroy() to destroy timers

src/cas/example/simple/exAsyncPV.cc

@@ -68,7 +68,7 @@ exAsyncWriteIO::~exAsyncWriteIO()
 {
 	this->pv.removeIO();
     if ( this->pv.getCAS() ) {
-        this->pv.getCAS()->destroyTimer ( this->timer );
+        this->timer.destroy ();
     }
 }
 
@@ -102,7 +102,7 @@ exAsyncReadIO::~exAsyncReadIO()
 {
 	this->pv.removeIO ();
     if ( this->pv.getCAS() ) {
-        this->pv.getCAS()->destroyTimer ( this->timer );
+        this->timer.destroy ();
     }
 }
 

src/cas/example/simple/exPV.cc

@@ -49,7 +49,7 @@ exPV::exPV ( pvInfo &setup, bool preCreateFlag, bool scanOnIn ) :
 exPV::~exPV() 
 {
     if ( this->getCAS() ) {
-        this->getCAS()->destroyTimer ( this->timer );
+        this->timer.destroy ();
     }
     this->info.unlinkPV();
 }

src/cas/example/simple/exServer.cc

@@ -329,7 +329,7 @@ exAsyncExistIO::exAsyncExistIO ( const pvInfo &pviIn, const casCtx &ctxIn,
 exAsyncExistIO::~exAsyncExistIO()
 {
     this->cas.removeIO ();
-    this->cas.destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 //
@@ -364,7 +364,7 @@ exAsyncCreateIO::exAsyncCreateIO ( pvInfo &pviIn, exServer &casIn,
 exAsyncCreateIO::~exAsyncCreateIO()
 {
     this->cas.removeIO ();
-    this->cas.destroyTimer ( this->timer );
+    this->timer.destroy ();
 }
 
 //