Watchpoint placing bugs

[jfabry]

Placing of watchpoints is broken in the code below, trying the code of the event:

• JFROSUtility poseOZ: robot odom pose pose.
• angle > target

(var target :=[0])
(machine rotateLeft
	(var angle := [nil])
	(state rotating)
	(state end)
	(on reached rotating -> end)
	(event reached [
		angle := JFROSUtility poseOZ: robot odom pose pose.
		angle > target
			ifTrue: [ (angle - target) < 10]
			ifFalse: [ (target - angle) < 10]])
)
(spawn rotateLeft rotating)
``