changed:
#doSave
#loadFromClass:
care for undefined class
(encountered when editing a spec of a non-appmodel class)
#define b_moveLeft_width 16
#define b_moveLeft_height 16
static unsigned char b_moveLeft_bits[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
0x00, 0x03, 0x80, 0x03, 0xc0, 0x03, 0x80, 0x03, 0x00, 0x03, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};