[patch] sound/usb/format: silence uninitialized variable warnings

[Dan Carpenter <error27@gmail.com>]

Gcc complains that ret might be used uninitialized:

sound/usb/format.c: In function ‘snd_usb_parse_audio_format’:
sound/usb/format.c:354: warning: ‘ret’ may be used uninitialized in this function
sound/usb/format.c:354: note: ‘ret’ was declared here
sound/usb/format.c:414: warning: ‘ret’ may be used uninitialized in this function
sound/usb/format.c:414: note: ‘ret’ was declared here

I suppose it could be if there is ever a UAC_VERSION_3 released. Anyway
this patch is worthwhile if only to silence the gcc warning.

Signed-off-by: Dan Carpenter <error27@gmail.com>

diff --git a/sound/usb/format.c b/sound/usb/format.c
index 4387f54..1400174 100644
--- a/sound/usb/format.c
+++ b/sound/usb/format.c
@@ -351,7 +351,8 @@ static int parse_audio_format_i(struct snd_usb_audio *chip,
 {
 	struct usb_interface_descriptor *altsd = get_iface_desc(iface);
 	int protocol = altsd->bInterfaceProtocol;
-	int pcm_format, ret;
+	int pcm_format;
+	int ret = -EINVAL;
 
 	if (fmt->bFormatType = UAC_FORMAT_TYPE_III) {
 		/* FIXME: the format type is really IECxxx
@@ -411,9 +412,10 @@ static int parse_audio_format_ii(struct snd_usb_audio *chip,
 				 int format, void *_fmt,
 				 struct usb_host_interface *iface)
 {
-	int brate, framesize, ret;
+	int brate, framesize;
 	struct usb_interface_descriptor *altsd = get_iface_desc(iface);
 	int protocol = altsd->bInterfaceProtocol;
+	int ret = -EINVAL;
 
 	switch (format) {
 	case UAC_FORMAT_TYPE_II_AC3: