In Segment, include bias-corrected output only if corresponding save_bias_corrected boolean is True. This prevents to throw an error when save_bias_corrected is set to False but Segment still looks for a created bias-corrected output.
In Segment, include bias-corrected output only if corresponding save_bias_corrected boolean is True.
This prevents to throw an error when save_bias_corrected is set to False but Segment still looks for a created bias-corrected output.

FredLoney/nipype,FredLoney/nipype,FredLoney/nipype