oprof_start fix

[William C. <wc...@nc...>]

The check in oprof_start.cpp for the unit_mask should only be check to 
make sure that the unit mask has some bits set for the bitmask version. 
Without this patch pretty much oprof_start will flag anything with 
"unit-mask:zero" as illegal unit mask.

2003-03-03  Will Cohen  <wc...@re...>

	* gui/oprof_start.cpp (oprof_start::on_start_profiler): Limit
	  check to onlyl utm_bitmask.

I have verified this patch work on the ia64 port.

-Will