Guard against trying to transform along size 0 axes#506

Merged

rgommers merged 3 commits into

PyWavelets:masterfrom

grlee77:guard_against_size0_axes

Jul 24, 2019

Commits on Jul 23, 2019

FIX: raise error on attempt to transform along an axis with size 0
grlee77
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MAINT: Check for non-zero data size in swt_axis and swt as well.
grlee77
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TST: Add test cases for swt and dwt with zero-sized inputs.
grlee77
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