fix windows warning about epicsShareClass

src/pv/pvaClient.h

@@ -1395,7 +1395,7 @@ public:
 
 // NOTE: must use separate class that implements MonitorRequester,
 // because pvAccess holds a shared_ptr to MonitorRequester instead of weak_pointer
-class epicsShareClass MonitorRequesterImpl;
+class MonitorRequesterImpl;
 typedef std::tr1::shared_ptr<MonitorRequesterImpl> MonitorRequesterImplPtr;
 
 /**
@@ -1532,7 +1532,7 @@ public:
 };
 // NOTE: must use separate class that implements RPCRequester,
 // because pvAccess holds a shared_ptr to RPCRequester instead of weak_pointer
-class epicsShareClass RPCRequesterImpl;
+class  RPCRequesterImpl;
 typedef std::tr1::shared_ptr<RPCRequesterImpl> RPCRequesterImplPtr;
 
 /**