don't try to register preprocessors when sprockets library is not initialised (app.assets is nil) closes #41
don't try to register preprocessors when sprockets library is not initialised (app.assets is nil) closes #41
ramiroaraujo/image_optim,toy/image_optim,weheartit/image_optim,toy/image_optim,weheartit/image_optim,mihailim/image_optim,mihailim/image_optim,toy/image_optim,mihailim/image_optim,weheartit/image_optim,ramiroaraujo/image_optim,ramiroaraujo/image_optim