g_ptr = &creature_ptr->current_floor_ptr->grid_array[yy][xx];
bool is_warning = (!easy_disarm && is_trap(creature_ptr, g_ptr->feat)) || (g_ptr->mimic && is_trap(creature_ptr, g_ptr->feat));
- is_warning = !one_in_(13);
+ is_warning &= !one_in_(13);
if (!is_warning) return TRUE;
object_type *o_ptr = choose_warning_item(creature_ptr);