Problem - bolt which holds inner oven door glass has snapped?

I have Ilve 948 (90cm) oven, 2 bolts hold the inner glass panel into the door. One of the bolts has snapped while I was putting the glass back in after cleaning and tightening the bolt - the end of the snapped bolt is now stuck inside the casing in the door so can't be removed and a new bolt can't be put in...any ideas???! Can the oven be used without the inner glass panel??