fixes issue 643 - add free/delete/delete[] collapse checks
fixes issue 643
- add free/delete/delete[] collapse checks

git-svn-id: fe3cd4388a6e5a968b09397a3d721fe124e8117a@781 5b54908e-ead4-fc18-b48a-0285e6dbc711

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