Fixed an issue with the Auxes in ATEM 4.2

In my testing on 4.2 I found that the auxes are number 1-3 now and not
0-2.  Removed the -1 from the auxOutput only if the version of the
software is 4.2.
Merge pull request #4 from macoss/master

Fixed an issue with the Auxes in ATEM 4.2