V4L/DVB: gspca: fixes compilation when input is not selected

It seems that I merged a wrong version of the patch or that
changeset 4d770eeb926d0bc44c0bd68d051d3d2a5568ef41 got mangled somehow:

It were missed the #else to avoid compilation troubles.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>