cdcontrol relative address track off-by-one fix

[Matthew Dillon]

:Before the patch, I would do:
:cdcontrol 1 0:15
:and it would play from track 2, 0:15, not track 1.
:
:That seemed to be caused by tr1-- being after toc_buffer[tr1], and
:toc_buffer[1] is track 2.
:
:I looked for similar problems, but did not find any.
:
:Cheers,
:
:Ben Woolley

    Committed!

					-Matt
					Matthew Dillon 
					<dillon at xxxxxxxxxxxxx>