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

The functions release_and_free_resource() and snd_util_memhdr_free() test
whether their argument is NULL and then return immediately.
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/isa/sb/emu8000_synth.c

@@ -105,7 +105,6 @@ static int snd_emu8000_delete_device(struct snd_seq_device *dev)
 		snd_device_free(dev->card, hw->pcm);
 	if (hw->emu)
 		snd_emux_free(hw->emu);
-	if (hw->memhdr)
 	snd_util_memhdr_free(hw->memhdr);
 	hw->emu = NULL;
 	hw->memhdr = NULL;

sound/isa/sb/sb_common.c

@@ -184,7 +184,6 @@ static int snd_sbdsp_probe(struct snd_sb * chip)
 
 static int snd_sbdsp_free(struct snd_sb *chip)
 {
-	if (chip->res_port)
 	release_and_free_resource(chip->res_port);
 	if (chip->irq >= 0)
 		free_irq(chip->irq, (void *) chip);