fixing is to ==

[alex-rakowski]

Fixing an bug I introduced.

tested with:

test_ptycho = py4DSTEM.process.phase.SingleslicePtychographicReconstruction(
    datacube=test_dc,
    verbose=False,
    energy=energy,
    semiangle_cutoff=semiangle_cutoff,
    defocus=defocus,
    #device='gpu',
    object_padding_px=(num_detector_pixels//4,)*2,
    object_type='potential',
).preprocess(
    force_com_rotation=0,
    force_com_transpose=False,
    plot_rotation=False,
    plot_center_of_mass = False,
).reconstruct(**reconstruct_params) 

and

test_DPC = py4DSTEM.process.phase.DPCReconstruction(
    datacube=test_dc,
    verbose=False,
    energy=energy, 
).preprocess(
    force_com_rotation=0,
    force_com_transpose=False,
    plot_rotation=False,
    plot_center_of_mass = False,
).reconstruct(**reconstruct_params)