GraphicsManager.image_count is declared as a size_t, so the Python type
needs to be the same width. On 64-bit big-endian architectures, this
mismatch was showing up as test failures:
======================================================================
FAIL: test_gr_delete (kitty_tests.graphics.TestGraphics)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/<<PKGBUILDDIR>>/kitty_tests/graphics.py", line 319, in test_gr_delete
self.ae(len(layers(s)), 0), self.ae(s.grman.image_count, 1)
ch = 20
cw = 10
delete = <function TestGraphics.test_gr_delete.<locals>.delete at 0x3ffb7fc38b0>
dx = 0.2
dy = 0.4
layers = <function put_helpers.<locals>.layers at 0x3ffb77709d0>
put_image = <function put_helpers.<locals>.put_image at 0x3ffb77708b0>
put_ref = <function put_helpers.<locals>.put_ref at 0x3ffb7770940>
rect_eq = <function put_helpers.<locals>.rect_eq at 0x3ffb7770a60>
s = <fast_data_types.Screen object at 0x1b60df0>
self = <kitty_tests.graphics.TestGraphics testMethod=test_gr_delete>
AssertionError: 0 != 1