add method == true in base.py

[Lenoush]

add

mri-nufft/src/mrinufft/operators/base.py

Lines 344 to 349 in 5044267

	if not method:
	self.density = None
	return None
	if method is True and hasattr(self, "pipe"):
	method = "pipe"

[chaithyagr]

Minor issues