Fixed warnings

src/osgDB/DatabasePager.cpp

@@ -1879,6 +1879,10 @@ public:
     
     DatabasePager::PagedLODList& _activePagedLODList;
     int _frameNumber;
+        
+protected:
+    
+    FindPagedLODsVisitor& operator = (const FindPagedLODsVisitor&) { return *this; }
 };
 
 void DatabasePager::registerPagedLODs(osg::Node* subgraph, int frameNumber)

src/osgDB/ImagePager.cpp

@@ -294,7 +294,7 @@ osg::Image* ImagePager::readImageFile(const std::string& fileName)
     return osgDB::readImageFile(fileName);
 }
 
-void ImagePager::requestImageFile(const std::string& fileName,osg::Object* attachmentPoint, int attachmentIndex, double timeToMergeBy, const osg::FrameStamp* framestamp)
+void ImagePager::requestImageFile(const std::string& fileName,osg::Object* attachmentPoint, int attachmentIndex, double timeToMergeBy, const osg::FrameStamp*)
 {
     osg::notify(osg::INFO)<<"ImagePager::requestNodeFile("<<fileName<<")"<<std::endl;
 
@@ -333,7 +333,7 @@ bool ImagePager::requiresUpdateSceneGraph() const
     return !(_completedQueue->_requestList.empty());
 }
 
-void ImagePager::updateSceneGraph(const osg::FrameStamp &frameStamp)
+void ImagePager::updateSceneGraph(const osg::FrameStamp&)
 {
     OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_completedQueue->_requestMutex);
 

src/osgDB/Registry.cpp

@@ -82,6 +82,8 @@ public:
 
 protected:
 
+    AvailableReaderWriterIterator& operator = (const AvailableReaderWriterIterator&) { return *this; }
+
     Registry::ReaderWriterList&     _rwList;
     OpenThreads::ReentrantMutex&    _pluginMutex;