ALSA: isa/wavefront: remove redundant assignment to pointer bptr

The pointer bptr is being assigned a value that is never read
and it is being updated in the next statement with a new value.
The initialization is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/isa/wavefront/wavefront_synth.c

@@ -788,7 +788,6 @@ wavefront_send_patch (snd_wavefront_t *dev, wavefront_patch_info *header)
 
 	dev->patch_status[header->number] |= WF_SLOT_FILLED;
 
-	bptr = buf;
 	bptr = munge_int32 (header->number, buf, 2);
 	munge_buf ((unsigned char *)&header->hdr.p, bptr, WF_PATCH_BYTES);