Check if unit can react 1

0018c920: 27bdffe8 addiu r29,r29,0xffe8
0018c924: afb00010 sw r16,0x0010(r29)
0018c928: afbf0014 sw r31,0x0014(r29)
0018c92c: 0c06325a jal 0x0018c968			check if unit can react?
0018c930: 00808021 addu r16,r4,r0
0018c934: 14400007 bne r2,r0,0x0018c954
0018c938: 00000000 nop
0018c93c: 0c063268 jal 0x0018c9a0			reaction check?
0018c940: 02002021 addu r4,r16,r0
0018c944: 14400003 bne r2,r0,0x0018c954
0018c948: 00000000 nop
0018c94c: 0c0604c3 jal 0x0018130c			Weapon guard usability (can react check)
0018c950: 02002021 addu r4,r16,r0
0018c954: 8fbf0014 lw r31,0x0014(r29)
0018c958: 8fb00010 lw r16,0x0010(r29)
0018c95c: 27bd0018 addiu r29,r29,0x0018
0018c960: 03e00008 jr r31
0018c964: 00000000 nop