Update Unit Display via Unit ID

#Parameters:
  #r4 = Unit ID

00068e58: 27bdffe8 addiu r29,r29,0xffe8
00068e5c: afbf0010 sw r31,0x0010(r29)
00068e60: 0c01e9c9 jal 0x0007a724               #Get Unit Misc Data Pointer from Unit ID
00068e64: 3084ffff andi r4,r4,0xffff            #r4 = Unit ID
00068e68: 0c01a342 jal 0x00068d08               #Status/sprite transformation/animation display setting
00068e6c: 00402021 addu r4,r2,r0
00068e70: 8fbf0010 lw r31,0x0010(r29)
00068e74: 27bd0018 addiu r29,r29,0x0018
00068e78: 03e00008 jr r31
00068e7c: 00000000 nop