Get Unit Misc Data Pointer

#   ROUTINE: GET UNIT MISC DATA POINTER (Alternate Documentation here: Get Unit Misc Data Pointer from Unit Misc ID)
#       Parameters:
#           r4 = (p_UnitMiscID) Unit misc data ID (to find the unit misc data pointer for)
#       Returns:
#           r2 = (Unit misc data pointer) for specified unit misc ID, or null if the specified ID had no corresponding data.

8007a6e4: 3c03800a lui r3,0x800a
8007a6e8: 8c638a54 lw r3,-0x75ac(r3)                #   miscDataPointer = *0x80098a54;
8007a6ec: 00000000 nop
8007a6f0: 1060000a beq r3,r0,0x8007a71c             #   if (miscDataPointer == null)
8007a6f4: 00001021 addu r2,r0,r0                    #       return null;
8007a6f8: 3084ffff andi r4,r4,0xffff                
                                                    #   do {
8007a6fc: 90620004 lbu r2,0x0004(r3)                #       // (miscDataPointer.UnitMiscID)
8007a700: 00000000 nop
8007a704: 10440005 beq r2,r4,0x8007a71c             #       if (miscDataPointer.UnitMiscID == p_UnitMiscID) 
8007a708: 00601021 addu r2,r3,r0                    #           return miscDataPointer;
                                                    
8007a70c: 8c630000 lw r3,0x0000(r3)                 #       miscDataPointer = miscDataPointer.previous;
8007a710: 00000000 nop
8007a714: 1460fff9 bne r3,r0,0x8007a6fc             #   } while (miscDataPointer != null);    
8007a718: 00001021 addu r2,r0,r0                    #   return null;
                                                   
8007a71c: 03e00008 jr r31
8007a720: 00000000 nop