png_init_filter_heuristics 1284 3rdparty/libpng/pngwrite.c    if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights))
png_init_filter_heuristics 1339 3rdparty/libpng/pngwrite.c    if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights))