#[br(dbg)] doesn't work when pad_before directive is also used

[crjennette]

When the debug attribute #[br(dbg)] is used for a field in the same struct as a #[br(pad_before=N)] attribute, the offset printed to output is incorrect.

When the following is used, the offsets printed would be 0x00, 0x04, and 0x08; but they should be 0x00, 0x08, and 0x0c.

#[derive(Debug)]
#[binrw]
struct Header{
    #[br(dbg)]
    field1: u32,
    #[br(dbg)]
    #[br(pad_before=4)]
    field2: u32,
    #[br(dbg)]
    field3: u32
}

[csnover]

Thanks for your report, and sorry for the delay. This will be fixed in the next release.