The ProcessBrowser crashes out of the box.
This fixes it.

from preamble:

"Change Set:		ProcessBrowser30gFixes-nk
Date:			16 February 2001
Author:			Ned Konz

A couple of fixes for Squeak 3.0Gamma:

* Does not crash if no MVC ScheduledControllers,
  which is the case out of the box

* Traps errors getting method text

* Identifies the SoundPlayer playerProcess, and
  does not allow it to be stopped or debugged

* Recovers more gracefully when there are problems
  identifying well-known processes
"!
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