vscsi: Fix changeset 19310.

Signed-off-by: Masaki Kanno <kanno.masaki@jp.fujitsu.com>

tools/python/xen/util/vscsi_util.py

@@ -90,7 +90,7 @@ def _vscsi_get_scsidevices_by_lsscsi(option = ""):
 
     devices = []
 
-    for scsiinfo in os.popen('lsscsi -g %s 2>/dev/null' % option).readlines():
+    for scsiinfo in os.popen('{ lsscsi -g %s; } 2>/dev/null' % option).readlines():
         s = scsiinfo.split()
         hctl = s[0][1:-1]
         try: