graphics/box: fix build on 32-bits
vmsym.c:567:28: error: incompatible function pointer types passing 'BoxTask (BoxVM *, BoxVMSymID, BoxUInt, int, void *, BoxUInt, void *, BoxUInt)' (aka 'BoxTask (struct BoxVM_struct *, unsigned long, unsigned long, int, void *, unsigned long, void *, unsigned long)') to parameter of type 'BoxVMSymResolver' (aka 'BoxTask (*)(struct BoxVM_struct *, unsigned long, unsigned long, int, void *, unsigned int, void *, unsigned int)') [-Wincompatible-function-pointer-types]
567 | BoxVMSym_Ref(vm, sym_id, My_Code_Generator, ref_all, ref_all_size, -1);
| ^~~~~~~~~~~~~~~~~
f674d29b53