Warning fixes

src/osgPlugins/txp/ReaderWriterTXP.cpp

@@ -652,6 +652,8 @@ public:
 
 protected:
     osg::Node* seamReplacement(osg::Node* node);
+    
+    SeamFinder& operator = (const SeamFinder&) { return *this; }
 
     int _x, _y, _lod;
     const TXPArchive::TileInfo& _info;

src/osgPlugins/txp/TXPIO.cpp

@@ -62,6 +62,10 @@ public:
         NodeVisitor::apply(node);
     }
     osgDB::Output &_fw;
+    
+protected:
+
+    Dump2Osg& operator = (const Dump2Osg&) { return *this; }
 };
 
 

src/osgPlugins/txp/TXPParser.cpp

@@ -293,6 +293,9 @@ public:
         traverse(group);
     }
 protected:
+
+    FindEmptyGroupsVisitor& operator = (const FindEmptyGroupsVisitor&) { return *this; }
+
     osg::NodeList& _nl;
 };
 

src/osgPlugins/txp/trpage_material.cpp

@@ -1074,21 +1074,15 @@ bool trpgTexture::isValid() const
     switch (mode) {
     case External:
 	return (name != NULL);
-	break;
     case Local:
 	return (type != trpg_Unknown && sizeX != -1 && sizeY != -1);
-	break;
     case Global:
 	return (type != trpg_Unknown);
-	break;
     case Template:
 	return (type != trpg_Unknown && sizeX != -1 && sizeY != -1);
-	break;
     default:
 	return false;
     }
-
-    return false;
 }