ALSA: compress: Pass through return value of open ops callback

The snd_compr_open function would always return 0 even if the compressed
ops open function failed, obviously this is incorrect. Looks like this
was introduced by a small typo in:

commit a0830dbd4e42b38aefdf3fb61ba5019a1a99ea85
ALSA: Add a reference counter to card instance

This patch returns the value from the compressed op as it should.

Signed-off-by: Charles Keepax <[e-mail]>
Acked-by: Vinod Koul <[e-mail]>
Cc: <[e-mail]>
Signed-off-by: Takashi Iwai <[e-mail]>

sound/core/compress_offload.c

···
 		kfree(data);
 	}
 	snd_card_unref(compr->card);
-	return 0;
+	return ret;
 }
 
 static int snd_compr_free(struct inode *inode, struct file *f)