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ao_oss: make error check slightly more correct 

Only a return value of -1 indicates an error for open(),
purely theoretically the mixer device could get 0 assigned
as file descriptor.
Even more theoretically, WinCE uses descriptors with values < 0,
though that probably is non-conformant behaviour.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@35295 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
reimar 2012-10-30 17:36:41 +00:00 committed by wm4
parent 3bebbe066d
commit 1ad5f3f0a4
1 changed files with 1 additions and 1 deletions
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2
libao2/ao_oss.c
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@ -194,7 +194,7 @@ static int control(int cmd,void *arg){
if(AF_FORMAT_IS_AC3(ao_data.format))
return CONTROL_TRUE;
if ((fd = open(oss_mixer_device, O_RDONLY)) > 0)
if ((fd = open(oss_mixer_device, O_RDONLY)) != -1)
{
ioctl(fd, SOUND_MIXER_READ_DEVMASK, &devs);
if (devs & (1 << oss_mixer_channel))