Do not create core image in TIFF seek()

[radarhere]

Pillow/src/PIL/TiffImagePlugin.py

Lines 1189 to 1198 in 1ee3bd1

	def seek(self, frame: int) -> None:
	"""Select a given frame as current image"""
	if not self._seek_check(frame):
	return
	self._seek(frame)
	# Create a new core image object on second and
	# subsequent frames in the image. Image may be
	# different size/mode.
	Image._decompression_bomb_check(self._tile_size)
	self.im = Image.core.new(self.mode, self._tile_size)

The core image instance does not need to be created here. It can be set to None instead, and the initialisation can delayed until load() (or more specifically, load_prepare()).

Pillow/src/PIL/TiffImagePlugin.py

Lines 1278 to 1280 in 1ee3bd1

	def load_prepare(self) -> None:
	if self._im is None:
	self.im = Image.core.new(self.mode, self._tile_size)