oiiotool --fit fixes: * wasn't modifying spec offsets properly * wasn't padding correctly for --fit:pad=1
oiiotool --fit fixes:
* wasn't modifying spec offsets properly
* wasn't padding correctly for --fit:pad=1

scott-wilson/oiio,YangYangTL/oiio,YangYangTL/oiio,scott-wilson/oiio,sambler/oiio,mcanthony/oiio,scott-wilson/oiio,YangYangTL/oiio,micler/oiio,mcanthony/oiio,micler/oiio,lgritz/oiio,OpenImageIO/oiio,cwilling/oiio,lgritz/oiio,scott-wilson/oiio,micler/oiio,lgritz/oiio,bdeluca/oiio,sambler/oiio,OpenImageIO/oiio,bdeluca/oiio,bdeluca/oiio,sambler/oiio,lgritz/oiio,micler/oiio,bdeluca/oiio,OpenImageIO/oiio,sambler/oiio,YangYangTL/oiio,cwilling/oiio,cwilling/oiio,OpenImageIO/oiio,mcanthony/oiio,cwilling/oiio,mcanthony/oiio