Fixing 'variable may be used uninitialized'
Fixing 'variable may be used uninitialized'

ddsinput.cpp:679:9: error: ‘w’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
         if (!w && !h && !d)
         ^

same for h and d

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