hotfix editing broken filters

note: i am dumb and the testing account has BYPASS_FILTERS so what i broke in changing filters went unnoticed
in future, will add more tests w/ different permission levels

lib/post/getfilterstrings.js

@@ -3,7 +3,7 @@
 module.exports = (req, res, strict=false) => {
 
 	//combines a bunch of parts of the post (name, subject, message, filenames+phashes)
-	const fileStrings = res.locals.numFiles === 0 ? '' : req.files.file.map(f => `${f.name}|${f.phash || ''}`).join('|');
+	const fileStrings = res.locals.numFiles ? req.files.file.map(f => `${f.name}|${f.phash || ''}`).join('|') : 0;
 	const combinedString = [req.body.name, req.body.message, req.body.subject, req.body.email, fileStrings].join('|').toLowerCase();
 	let strictCombinedString = combinedString;
 

models/forms/editpost.js

@@ -29,7 +29,7 @@ todo: handle some more situations
 	const { board, post } = res.locals;
 
 	//filters
-	if (res.locals.permissions.get(Permissions.BYPASS_FILTERS)) {
+	if (!res.locals.permissions.get(Permissions.BYPASS_FILTERS)) {
 		//only global filters are checked, because anybody who could edit bypasses board filters
 		const { filters, filterMode, filterBanDuration } = config.get;
 		if (filters.length > 0 && filterMode > 0) {