fix typo error in init

Fixes: #210

Signed-off-by: Tianling Shen <[email protected]>
(cherry picked from commit 8952f6e6e31fe15d100e20b979fef057d17190be)

root/etc/init.d/unblockneteasemusic

@@ -164,7 +164,7 @@ start_service() {
 	local tmp="/tmp/$NAME"
 	if [ "${hijack_ways}" = "use_ipset" ]; then
 		local settype nftflag
-		if [ -n "$FW4"]; then
+		if [ -n "$FW4" ]; then
 			settype="nftset"
 			nftflag="inet#fw4#"
 		else