fixed issue i#1140 - add check dcontext->last_exit with linkstub_native_exec_syscall
fixed issue i#1140
- add check dcontext->last_exit with linkstub_native_exec_syscall

SVN-Revision: 2054

sigma-random/dynamorio,bl4ckic3/dynamorio,daksunt/dynamorio,AmesianX/dynamorio,sigma-random/dynamorio,code4bones/dynamorio,daksunt/dynamorio,AmesianX/dynamorio,bl4ckic3/dynamorio,bl4ckic3/dynamorio,sigma-random/dynamorio,daksunt/dynamorio,bl4ckic3/dynamorio,AmesianX/dynamorio,sigma-random/dynamorio,code4bones/dynamorio,daksunt/dynamorio,AmesianX/dynamorio,sigma-random/dynamorio,bl4ckic3/dynamorio,code4bones/dynamorio,AmesianX/dynamorio,code4bones/dynamorio,daksunt/dynamorio,code4bones/dynamorio