Two bugs fixed :

1. Often the execution point is displayed on the wrong line in the "Source listing" window.

2. When a Toolbox task examined with DeskDebug halts after a break-point or single-step, and another running Toolbox task gets a Wimp or Toolbox event, then the error message "Not a Toolbox task" was displayed, or other probles can occur when the task being examined is single-stepped further or continued.