Get Battle Unit Index By Unit Misc ID

#   ROUTINE: GET BATTLE UNIT INDEX BY UNIT MISC ID
#       Parameters:
#           r4 = (unitMiscID) Unit misc data ID
#       Returns:
#           r2 =    (Battle unit index) of unit with specified misc ID, if exists
#                   -1, if no battle unit with specified misc ID exists

8008cdd0: 27bdffe8 addiu r29,r29,-0x0018
8008cdd4: afbf0010 sw r31,0x0010(r29)
8008cdd8: 0c01e9b9 jal 0x8007a6e4                   #   unitMiscData = Get Unit Misc Data Pointer (unitMiscID);
8008cddc: 3084ffff andi r4,r4,0xffff
8008cde0: 10400008 beq r2,r0,0x8008ce04             #   if (unitMiscData != null) {
8008cde4: 00000000 nop
8008cde8: 8c420134 lw r2,0x0134(r2)                 #       unitMiscData.battleUnit
8008cdec: 00000000 nop
8008cdf0: 10400006 beq r2,r0,0x8008ce0c             #       if (unitMiscData.battleUnit != null) {
8008cdf4: 00000000 nop
8008cdf8: 9042018a lbu r2,0x018a(r2)                #           return unitMiscData.battleUnit.index;
8008cdfc: 08023384 j 0x8008ce10                     #       }
8008ce00: 00000000 nop                              #   } else {
8008ce04: 0c01128d jal 0x80044a34                   #       ? 0x44a34 (12);     // Routine has no real effect?
8008ce08: 3404000c ori r4,r0,0x000c
8008ce0c: 2402ffff addiu r2,r0,-0x0001              #       return -1;
                                                    #   }
8008ce10: 8fbf0010 lw r31,0x0010(r29)
8008ce14: 27bd0018 addiu r29,r29,0x0018
8008ce18: 03e00008 jr r31
8008ce1c: 00000000 nop