From Tree, moved GL_ #define's out of osg namespaces

include/osg/State

@@ -26,8 +26,6 @@
 #include <vector>
 #include <map>
 
-namespace osg {
-
 #ifndef GL_TEXTURE0
 #define GL_TEXTURE0 0x84C0
 #endif
@@ -48,6 +46,8 @@ namespace osg {
     #endif
 #endif
 
+namespace osg {
+
 /** macro for use with osg::StateAttribute::apply methods for detecting and 
   * reporting OpenGL error messages.*/
 #define OSG_GL_DEBUG(message) \