Fix png inputs sCal flag

Due to change of behavior with libpng, where files have been updated
with a METER sCal field.

Change-Id: Ic7d8bcbda32143c31e31d0a5213f1434728df008
Fixing png sCal field to METER

Change-Id: If8cfc05b5b5927faedd47372ad9029f4fc79d628
Merge branch 'SIMPLEITK_589_FixPNGsCalField' into release

* SIMPLEITK_589_FixPNGsCalField:
  Fix png inputs sCal flag

Change-Id: Ib4481f0885b1acb4c6eeccb2b82bf4ea4a32cb3c
Merge topic 'SIMPLEITK-590_FixPNGsCalMaster'

d5fd24c2 Fixing png sCal field to METER
Merge topic 'SIMPLEITK_589_FixPNGsCalField'

8d87af8b Fix png inputs sCal flag
Merge branch 'release'

Change-Id: Ie7c7757fa6bd11864598e9f03484af89a265c5da