png_reset_filter_heuristics  920 pngwrite.c     static void png_reset_filter_heuristics(png_structrp png_ptr);/* forward decl */
png_reset_filter_heuristics  946 pngwrite.c        png_reset_filter_heuristics(png_ptr);
png_reset_filter_heuristics 1166 pngwrite.c        png_reset_filter_heuristics(png_ptr);