temporary fix invalid ids

dbTools/post.js

@@ -111,7 +111,7 @@ postDB = (DB)=>{
     DB.getPosts = async (profileId, viewerProfileId) => {
         const profile = await DB.getProfile(viewerProfileId);
         let query = {};
-        if(profileId) {
+        if(profileId && DB.ObjectID.isValid(profileId)) {
             const id = DB.ObjectID(profileId);
             query = {
                 $or: [
@@ -119,6 +119,8 @@ postDB = (DB)=>{
                     {toProfile: id}
                 ]
             };
+        } else {
+            if(profileId) return [];
         }
         return DB.postCols.find(query).sort({_id: -1}).limit(20).toArray().then(async (posts)=>{
             return await filterPrivateGroups(posts, profile);