fixes issue 1029
fixes issue 1029

Add configure-time check that ensures the larger-limit NSIS is in place.

git-svn-id: fe3cd4388a6e5a968b09397a3d721fe124e8117a@1193 5b54908e-ead4-fc18-b48a-0285e6dbc711

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