* heap.cc (heap_init): Fix setting reserved_size value when using
	ptmalloc3 to avoid too much pagefile pressure at fork time.
	* msg.cc (client_request_msg::serve): Revert change to refuse 64 bit
	processes on 32 bit systems.
	* sem.cc (client_request_sem::serve): Ditto.
	* shm.cc (client_request_shm::serve): Ditto.