# note: An ANMF chunk declaring less than the image inside it takes up.
# expect: reject
# anim: reject
# info: reject
# roundtrip: no
# exercises: The other of the two size tests in ParseAnimationFrame(): after
#   StoreFrame() has read the frame's chunks, what it consumed is compared
#   against what the ANMF said its payload was. The image is really there
#   and reads back fine; it is the ANMF header's own arithmetic that does
#   not add up, and the frame is refused for overrunning itself.
chunk_size ANMF 20
frame
frame_duration 100
lossless
width 16
height 16
argb 0xff800000 x256