Better checking whether the script is executed from bash.

Should work on more platforms now.


git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@1347 8092fc87-c524-0410-9efc-e669fe64eaf9

sc2/subst

@@ -3,12 +3,9 @@
 
 # We need bash functionality. Executing bash with the shebang won't be
 # portable as the location of bash differs.
-SHELLFILE="$_"
-case "$SHELLFILE" in
-	sh|*/sh)
-		exec bash "$0" "$@"
-		;;
-esac
+if [ -z "$BASH_VERSION" ]; then
+	exec bash "$0" "$@"
+fi
 
 if [ $# -eq 0 ]; then
 	{