fixes issue 1102
fixes issue 1102

Set arg->pre to true for drsys_iterate_args() even when in post-syscall in order
to hit all the report_sysarg() cases in os_handle_pre_syscall().

git-svn-id: fe3cd4388a6e5a968b09397a3d721fe124e8117a@1148 5b54908e-ead4-fc18-b48a-0285e6dbc711

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