qemu-socket: don't leak opts on error

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
index 126cbb6..095716e 100644
--- a/util/qemu-sockets.c
+++ b/util/qemu-sockets.c
@@ -963,7 +963,7 @@
 
     default:
         error_setg(errp, "socket type unsupported for datagram");
-        return -1;
+        fd = -1;
     }
     qemu_opts_del(opts);
     return fd;