Fixed replacestr

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@16608 54d463be-8e91-2dee-dedb-b68131a5f0ec

src/map/script.c

@@ -13945,7 +13945,7 @@ BUILDIN_FUNC(replacestr)
 
 	if(script_hasdata(st, 6)) {
 		count = script_getnum(st, 6);
-		if(!count) {
+		if(count == 0) {
 			ShowError("script:replacestr: Invalid count value. Expected int got string\n");
 			st->state = END;
 			return 1;