X-Git-Url: http://git.tuebingen.mpg.de/?p=gsu.git;a=blobdiff_plain;f=common;h=e3268907a385cb5417ac60796f2f0a50fcbeed2f;hp=cd07252fa1d6917905b41d868fcdbcb67d54f89b;hb=8c4ae5b0f1b839dea40d7aae40de5e15b325ff35;hpb=2925cf7299f958ed6c52ba1ba9d42a841d86c8f2

diff --git a/common b/common
index cd07252..e326890 100644
--- a/common
+++ b/common
@@ -1,5 +1,6 @@
 #!/bin/bash
-# (C) 2006-2011 Andre Noll
+# Copyright (C) 2006 Andre Noll
+# Licensed under the LGPL, version 3. See COPYING and COPYING.LESSER.
 
 _gsu_init_errors()
 {
@@ -38,7 +39,7 @@ EOF
 gsu_is_a_number()
 {
 	result="$1"
-	if (("$1" == "$1")) &> /dev/null; then
+	if [ "$1" -eq "$1" ] &> /dev/null; then
 		ret=$GSU_SUCCESS
 	else
 		ret=-$E_GSU_NOT_A_NUMBER