ALSA: hda - Add an error message for invalid mapping NID

Add an error message to snd_hda_add_nid() for invalid mapping NID to make
easier to hunt the buggy code.

Also added a missing space to the error message in snd_hda_build_controls()

Signed-off-by: Takashi Iwai <tiwai@suse.de>
1 file changed