#16 Function blocks don't work.

[Bill Yerazunis]

The function blocks (1->1, 1->2, and 1->4) have two problems:

1) the "track line" needs to be reinitialized by the user before it even draws correctly (mode pulldown to "reset", then click on the line).

2) Even when it draws correctly, the output is always zero, no matter what the input.

I looked at the code but I don't have a fix for either.