graphics: a retransmit invalidates every placement of the image

Replacing an image's pixels deletes all of its placements on the
client -- kitty drops them when the data is replaced, which is the very
fact the place-once logic leans on. But the invalidation rode a local
in one gfx_place() call, so only the placement said in the same breath
as the transmit was owed again. The image's other placements -- a
second one elsewhere, the other pieces of one a float has cut -- were
judged unchanged against a client that no longer holds them, and
stayed unsaid: a picture the client deleted and we believe it still
has, gone until something moves it.

Masked before place-once by the every-frame re-emission, so this is
the regression that fix bought. The transmit now un-marks every
placement of its image, and each is said again as its gfx_place()
comes around.

The live check drives one image placed twice, then replaces its
pixels and places both again: both must reach the client after the
second transmit, where the old code re-sent one.

0 files changed, 0 insertions, 0 deletions