simplify stest

dmenu_run

@@ -5,10 +5,8 @@ if [ ! -d "`dirname "$CACHE"`" ]; then
 fi
 (
 	IFS=:
-	if ls -d $PATH | stest -q -n "$CACHE"; then
-		for dir in $PATH; do
-			ls $dir | stest -C $dir -fx
-		done | sort -u > "$CACHE"
+	if stest -dqr -n "$CACHE" $PATH; then
+		stest -flx $PATH | sort -u > "$CACHE"
 	fi
 )
 cmd=`dmenu "$@" < "$CACHE"` && exec sh -c "$cmd"