mstart.sh: remove bashizm in /bin/sh script

Signed-off-by: Mykola Golub <to.my.trociny@gmail.com>

diff --git a/src/mstart.sh b/src/mstart.sh
index a1821c2828680104ef6b009dffb26d60b389f0cd..327591751849c989b52eef000433de448683ea1c 100755 (executable)
--- a/src/mstart.sh
+++ b/src/mstart.sh
@@ -28,7 +28,7 @@ RUN_ROOT_PATH=${root_path}/run
 
 mkdir -p $RUN_ROOT_PATH
 
-if [ "$CLUSTERS_LIST" == "" ]
+if [ -z "$CLUSTERS_LIST" ]
 then
   CLUSTERS_LIST=$RUN_ROOT_PATH/.clusters.list
 fi