staging: comedi: cb_pcidda: fix error test in cb_pcidda_attach_pci()

As pointed out by Fengguang Wu, the error test after finding the
boardinfo should be testing for (!thisboard).

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed