- modified theme_block() to ignore blocks that have no content.
- modified theme_block() to ignore blocks that have no content.

rmcveigh/frontend-dev,joshkoenig/golden-god-demo,OccupyWallStreet/streetnet,brainhell/drupalglass,joshkoenig/golden-god-demo,rmcveigh/frontend-dev,brainhell/drupalglass,edutrul/social-web,edutrul/social-web,lincgr/Prueba,brainhell/drupalglass,edutrul/social-web,joshkoenig/golden-god-demo,joshkoenig/golden-god-demo,joshkoenig/golden-god-demo,rmcveigh/frontend-dev,brainhell/drupalglass,joshkoenig/golden-god-demo,lincgr/Prueba,OccupyWallStreet/streetnet,edutrul/social-web,joshkoenig/golden-god-demo,edutrul/social-web,lincgr/Prueba,OccupyWallStreet/streetnet,OccupyWallStreet/streetnet,brainhell/drupalglass,lincgr/Prueba