movdump: add 1 to tm::tm_mon in timestamp output
movdump: add 1 to tm::tm_mon in timestamp output

tm_mon ranges from 0..11 and the timestamp string should range
from 1..12

stuarthicks/bmx,kierank/bmxlib-bmx,Limecraft/ebu-bmx,kierank/bmxlib-bmx,Limecraft/ebu-bmx,stuarthicks/bmx,xunchangguo/BMX,kierank/bmxlib-bmx,xunchangguo/BMX,Limecraft/ebu-bmx,xunchangguo/BMX,stuarthicks/bmx