fix usage of addmm for new API
fix usage of addmm for new API

jonathantompson/cunn,rotmanmi/cunn,andreaskoepf/cunn,clementfarabet/cunn,apaszke/cunn,Aysegul/cunn,colesbury/cunn,apaszke/cunn,jhjin/cunn,andreaskoepf/cunn,rotmanmi/cunn,davidBelanger/cunn,szagoruyko/cunn,davidBelanger/cunn,jonathantompson/cunn,ml-lab/cunn,soumith/cunnsparse,lukasc-ch/cunn,apaszke/cunn,danielsig727/cunn,szagoruyko/cunn,fmassa/cunn,clementfarabet/cunn,jhjin/cunn,hughperkins/cunn,albanD/cunn,Saulzar/cunn,colesbury/cunn,colesbury/cunn,lukasc-ch/cunn,ominux/cunn