ALSA: core: Deletion of unnecessary checks before two function calls

The functions snd_seq_oss_timer_delete() and vunmap() perform also input
parameter validation. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/core/seq/oss/seq_oss_init.c

@@ -403,13 +403,10 @@ free_devinfo(void *private)
 {
 	struct seq_oss_devinfo *dp = (struct seq_oss_devinfo *)private;
 
-	if (dp->timer)
 	snd_seq_oss_timer_delete(dp->timer);
 		
-	if (dp->writeq)
 	snd_seq_oss_writeq_delete(dp->writeq);
 
-	if (dp->readq)
 	snd_seq_oss_readq_delete(dp->readq);
 	
 	kfree(dp);

sound/core/sgbuf.c

@@ -39,7 +39,6 @@ int snd_free_sgbuf_pages(struct snd_dma_buffer *dmab)
 	if (! sgbuf)
 		return -EINVAL;
 
-	if (dmab->area)
 	vunmap(dmab->area);
 	dmab->area = NULL;