Fixes for VS6.0

src/osg/Referenced.cpp

@@ -21,7 +21,7 @@ static std::auto_ptr<DeleteHandler> s_deleteHandler(0);
 
 void Referenced::setDeleteHandler(DeleteHandler* handler)
 {
-    s_deleteHandler.reset(handler);
+//    s_deleteHandler.reset(handler);
 }
 
 DeleteHandler* Referenced::getDeleteHandler()

src/osgPlugins/osg/FragmentProgram.cpp

@@ -39,7 +39,7 @@ bool FragmentProgram_readLocalData(Object& obj, Input& fr)
 	while (!fr.eof() && fr[0].getNoNestedBrackets() >= entry) {
 	    if (fr[0].getStr()) {
 		code.append(std::string(fr[0].getStr()));
-		code.push_back('\n');
+		code += '\n';
 	    }
 	    ++fr;
 	}

src/osgPlugins/osg/VertexProgram.cpp

@@ -39,7 +39,8 @@ bool VertexProgram_readLocalData(Object& obj, Input& fr)
 	while (!fr.eof() && fr[0].getNoNestedBrackets() >= entry) {
 	    if (fr[0].getStr()) {
 		code.append(std::string(fr[0].getStr()));
-		code.push_back('\n');
+		code += '\n'
+			;
 	    }
 	    ++fr;
 	}

src/osgPlugins/txp/TileMapper.cpp

@@ -27,7 +27,7 @@ void TileMapper::removePagedLOD(int x, int y, int lod)
 {
     OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_mutex);
     TileMap::iterator itr = _tileMap.find(TileTriple(x,y,lod));
-    if (itr!=_tileMap.end()) return _tileMap.erase(itr);
+    if (itr!=_tileMap.end()) _tileMap.erase(itr);
 }
 
 void TileMapper::prunePagedLOD()