[ALSA] sb16 - Suppress compile warning

sound/isa/sb/sb16_csp.c: In function ‘snd_sb_csp_new’:
sound/isa/sb/sb16_csp.c:121: warning: ‘version’ may be used uninitialized in this function

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>