Height/coordinate validation

0017b3f4: 27bdffd8 addiu r29,r29,0xffd8
0017b3f8: afb00018 sw r16,0x0018(r29)
0017b3fc: 00808021 addu r16,r4,r0			Attacker ID
0017b400: afb20020 sw r18,0x0020(r29)
0017b404: 8fb20038 lw r18,0x0038(r29)		load target ID
0017b408: 27a40010 addiu r4,r29,0x0010
0017b40c: afbf0024 sw r31,0x0024(r29)
0017b410: afb1001c sw r17,0x001c(r29)
0017b414: 0c05f056 jal 0x0017c158			Calculate_Height_Data
0017b418: 02402821 addu r5,r18,r0
0017b41c: 93a20013 lbu r2,0x0013(r29)
0017b420: 00000000 nop
0017b424: 30420080 andi r2,r2,0x0080
0017b428: 14400016 bne r2,r0,0x0017b484		???
0017b42c: 2402ffff addiu r2,r0,0xffff
0017b430: 02002821 addu r5,r16,r0			Attacker ID
0017b434: 93b00015 lbu r16,0x0015(r29)
0017b438: 93b10016 lbu r17,0x0016(r29)		load coordinates?
0017b43c: 0c05f056 jal 0x0017c158			Calculate_Height_Data
0017b440: 27a40010 addiu r4,r29,0x0010
0017b444: 93a20013 lbu r2,0x0013(r29)
0017b448: 00000000 nop
0017b44c: 30420080 andi r2,r2,0x0080
0017b450: 10400003 beq r2,r0,0x0017b460
0017b454: 00000000 nop
0017b458: 0805ed21 j 0x0017b484
0017b45c: 2402ffff addiu r2,r0,0xffff
0017b460: 93a30016 lbu r3,0x0016(r29)		load coordinate?
0017b464: 93a40015 lbu r4,0x0015(r29)
0017b468: 0203182b sltu r3,r16,r3			set if coordinate < max coordinate?
0017b46c: 10600005 beq r3,r0,0x0017b484		branch if not
0017b470: 2402ffff addiu r2,r0,0xffff
0017b474: 0224182b sltu r3,r17,r4
0017b478: 14600002 bne r3,r0,0x0017b484		same check
0017b47c: 00000000 nop
0017b480: 02401021 addu r2,r18,r0			return target ID
0017b484: 8fbf0024 lw r31,0x0024(r29)
0017b488: 8fb20020 lw r18,0x0020(r29)
0017b48c: 8fb1001c lw r17,0x001c(r29)
0017b490: 8fb00018 lw r16,0x0018(r29)
0017b494: 27bd0028 addiu r29,r29,0x0028
0017b498: 03e00008 jr r31
0017b49c: 00000000 nop