init: fix loop counter

expr does not do math like used:
$ expr 0+1
0+1

use shell arithmetics

diff --git a/lxd.init b/lxd.init
index 329d74ab825172dff8ff3188cee9fb5cf0150fd6..4f2b14e477ee6af834248af3f6422e48ab0c1e2b 100755 (executable)
--- a/lxd.init
+++ b/lxd.init
@@ -48,7 +48,7 @@ start() {
                [ -z "$pid" ] && sleep 1
                pid=$(lxc info 2>/dev/null | grep serverpid: | awk '{print $2}')
                echo $pid > $pidfile
-               ntry=$(expr $ntry+1)
+               ntry=$(($ntry+1))
        done
 
        if [ -n "$pid" ]; then