PNG_CHUNK_SAFE_TO_COPY  132 contrib/libtests/pngunknown.c #define PNG_CHUNK_SAFE_TO_COPY(c) (1 & ((c) >>  5))
PNG_CHUNK_SAFE_TO_COPY  802 pngpriv.h      #define PNG_CHUNK_SAFE_TO_COPY(c) (1 & ((c) >>  5))