Fixed bookmark bug.

app/Http/Controllers/BoardController.php

@@ -267,7 +267,7 @@ class BoardController extends Controller {
             $valid = $this->objAuth->getPermissions($request->username, $request->password);
 
             if ($valid['for_editown'] == 1) {
-                if ($request->for_id !== 0) {
+                if (isset($request->for_id)) {
                     DB::table('for_bookmarks')
                         ->where('user_id', $check)
                         ->where('for_id', $request->for_id)
@@ -275,8 +275,8 @@ class BoardController extends Controller {
 
                     return 'Success!';
                 }
-                else if ($request->top_id !== 0) {
-                    DB::table('for_bookmarks')
+                else if (isset($request->top_id)) {
+                    $res = DB::table('for_bookmarks')
                         ->where('user_id', $check)
                         ->where('top_id', $request->top_id)
                         ->delete();