Added explicit initialization of osg::Referenced(true) to osg::Operation subclasses as it uses virtual inhertiance from osg::Referenced.

git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@15025 16af8721-9629-0410-8352-f15c8da7e697

include/osg/GraphicsThread

@@ -49,6 +49,7 @@ struct OSG_EXPORT GraphicsOperation : public Operation
 struct OSG_EXPORT SwapBuffersOperation : public GraphicsOperation
 {
     SwapBuffersOperation():
+        osg::Referenced(true),
         GraphicsOperation("SwapBuffers",true) {}
 
     virtual void operator () (GraphicsContext* context);
@@ -65,6 +66,7 @@ struct OSG_EXPORT BarrierOperation : public Operation, public OpenThreads::Barri
     };
 
     BarrierOperation(int numThreads, PreBlockOp op=NO_OPERATION, bool keep=true):
+        osg::Referenced(true),
         Operation("Barrier", keep),
         OpenThreads::Barrier(numThreads),
         _preBlockOp(op) {}
@@ -81,6 +83,7 @@ struct OSG_EXPORT BarrierOperation : public Operation, public OpenThreads::Barri
 struct OSG_EXPORT ReleaseContext_Block_MakeCurrentOperation : public GraphicsOperation, public RefBlock
 {
     ReleaseContext_Block_MakeCurrentOperation():
+        osg::Referenced(true),
         GraphicsOperation("ReleaseContext_Block_MakeCurrent", false) {}
 
     virtual void release();

include/osg/OperationThread

@@ -52,7 +52,6 @@ class Operation : virtual public Referenced
     public:
 
         Operation(const std::string& name, bool keep):
-            osg::Referenced(true),
             _name(name),
             _keep(keep) {}
 
@@ -75,14 +74,12 @@ class Operation : virtual public Referenced
         /** Do the actual task of this operation.*/
         virtual void operator () (Object*) = 0;
 
-    protected:
+protected:
 
         Operation():
-            Referenced(true),
             _keep(false) {}
 
         Operation(const Operation& op):
-            Referenced(true),
             _name(op._name),
             _keep(op._keep) {}