SUBMITTED: MathCHOP scope problem... build901

Bugs
1

  1. put down a Constant CHOP and put ‘chan1’ and ‘chan2’ in the channel name fields.

  2. append a Math CHOP and set its Scope to chan1 only

  3. attach a wave CHOP to the input of the Math CHOP, and set the cmbine CHOPs parameter to ‘ADD’

  4. notice that the wave also gets added to chan2 when it should only get added to chan1

workaround is to just use separate math CHOPs and merge them later.