ossaudio: fix memory leak

Variable "conf" going out of scope leaks the storage
it points to in line 856.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Message-Id: <1435021270-7768-1-git-send-email-arei.gonglei@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

audio/ossaudio.c

diff --git a/audio/ossaudio.c b/audio/ossaudio.c
index 11e76a1..7dbe333 100644
--- a/audio/ossaudio.c
+++ b/audio/ossaudio.c
@@ -853,6 +853,7 @@
 
     if (access(conf->devpath_in, R_OK | W_OK) < 0 ||
         access(conf->devpath_out, R_OK | W_OK) < 0) {
+        g_free(conf);
         return NULL;
     }
     return conf;