double_difference yields TypeError: `pad_width` must be of integral type.

[amrit-thapa-2044]

Description of the problem

could not perform double differencing of the interferogram.

Full script that generated the error

!spatial_filter.py  ./inputs/ifgramStack.h5 unwrapPhase -f double_difference -p 1 10

Full error message

TypeError: `pad_width` must be of integral type.

System information

• Operating system: Linux
• Python environment: Conda env: insar_analysis in OpenSarLab
• MintPy version: MintPy version 1.5.1
• Your custom / default template file (if the bug is related to a specific dataset):

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[yunjunz]

Thank you for reporting this bug @amrit-thapa-2044. I was able to reproduce your error. It should be fixed by the PR above. Cheers.