Set empty array if permissions are null

Signed-off-by: snipe <snipe@snipe.net>

app/Models/User.php

@@ -744,10 +744,20 @@ class User extends SnipeModel implements AuthenticatableContract, AuthorizableCo
 
     public function decodePermissions()
     {
-        $permissions = json_decode($this->permissions, JSON_OBJECT_AS_ARRAY);
+        // Set default to empty JSON if the value is null
+        $permissions = json_decode($this->permissions ?? '{}', JSON_OBJECT_AS_ARRAY);
+
+        // If there are no permissions, return an empty array
+        if (!$permissions) {
+            return [];
+        }
+
+        // Otherwise, loop through the permissions and cast the values as integers
         foreach ($permissions as $permission => $value) {
             $permissions[$permission] = (int) $value;
         }
+
+
         return $permissions;
     }