Fix IncrementalTextLayout's top after arbitrary update
Fix IncrementalTextLayout's top after arbitrary update

oktayacikalin/pyglet,theblacklion/pyglet,oktayacikalin/pyglet,theblacklion/pyglet,oktayacikalin/pyglet,oktayacikalin/pyglet,theblacklion/pyglet,oktayacikalin/pyglet,mammadori/pyglet,mammadori/pyglet,theblacklion/pyglet,theblacklion/pyglet,mammadori/pyglet,mammadori/pyglet