i#935: work around missing app retaddr on stack from drwrap_replace_native() by retrieving the stored app retaddr and using as the top frame
i#935: work around missing app retaddr on stack from
drwrap_replace_native() by retrieving the stored app retaddr
and using as the top frame

git-svn-id: fe3cd4388a6e5a968b09397a3d721fe124e8117a@912 5b54908e-ead4-fc18-b48a-0285e6dbc711

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