demandimport: blacklist gtk
Demandimport breaks gtk. You get a meaningless error about
'failed loading gobject\_gobject.pyd'. Mercurial does not use gtk,
but this trips up many extension writers.
adding b
rev offset length base linkrev nodeid p1 p2
0 0 3 0 0 1e88685f5dde 000000000000 000000000000