CheckIfInrangeAndReassign's second stack argument is the packet size, not a unit
CheckIfInrangeAndReassign types Stack[0x8] as D2UnitStrc * pUnit2, but the body only compares it with 5 (005496f9 CMP dword ptr [EBP+0xc],0x5) and returns 3, SERVERSTATUS_BAD_PARAMS, when it differs. All six callers are the location-targeted C2S handlers (0x01, 0x03, 0x05, 0x08, 0x0C, 0x0F, each 5 bytes: id, x, y) and pass their own nSize there: SCMD_0x01_WalkToLocation loads EDX from [EBP+0xc] (its nSize) at 005497f3 and pushes it at 005497f7. The generated source shows it as CheckIfInrangeAndReassign(pGame, (D2UnitStrc*)nSize, ...) at every site. This retypes it to uint32_t. The name pUnit2 is wrong too (nSize would match the callers), but the tool will not rename a chosen name, so that is left to review.
Changes 1, applied together
Retype variable
win 0x005496f0 Stack[0x8]typeD2UnitStrc *→uint32_t