Simplify Python code by passing tuples to C

[radarhere]

In code like the following

Pillow/src/PIL/WebPImagePlugin.py

Lines 225 to 227 in 2810d7c

	enc = _webp.WebPAnimEncoder(
	im.size[0],
	im.size[1],

there is no need to split the im.size tuple into multiple parts before passing it to C. We can pass just im.size by adjusting

Pillow/src/_webp.c

Lines 165 to 169 in 2810d7c

	if (!PyArg_ParseTuple(
	args,
	"iiIiiiiii",
	&width,
	&height,

to receive a tuple.