Added State::disableTexCoordPointersAboveAndIncluding( unit ) method so that

all unsed texture units can be turned off simply within Drawables such
as Geometry and GeoSet. This can be used to prevent bleed of arrays from
one object to the next - which can cause crashes.

src/osg/Geometry.cpp

@@ -48,7 +48,8 @@ void Geometry::drawImmediateMode(State& state)
     state.setVertexPointer(3,GL_FLOAT,0,_vertexArray->dataPointer());
     
     // set up texture coordinates.
-    for(unsigned int i=0;i<_texCoordList.size();++i)
+    unsigned int i;
+    for(i=0;i<_texCoordList.size();++i)
     {
         Array* array = _texCoordList[i].get();
         if (array)
@@ -56,6 +57,7 @@ void Geometry::drawImmediateMode(State& state)
         else
             state.disableTexCoordPointer(i);
     }
+    state.disableTexCoordPointersAboveAndIncluding(i);
     
     
     // set up normals.