fixes issue 1155
fixes issue 1155

Suppress a real uninitialized read in VS2012 istream code.

git-svn-id: fe3cd4388a6e5a968b09397a3d721fe124e8117a@1219 5b54908e-ead4-fc18-b48a-0285e6dbc711

rnk/drmemory,rnk/drmemory,rnk/drmemory,rnk/drmemory