Bugfix molwm
the funcitons mesh_on_[lw]an_enable are being called to often and the functions mesh_on_[lw]an_disable are being called to rare. this PR fixes this. it was testet with one system from the 20161126-branch
the funcitons mesh_on_[lw]an_enable are being called to often and the functions mesh_on_[lw]an_disable are being called to rare. this PR fixes this. it was testet with one system from the 20161126-branch