emit_error       1012 contrib/tools/pngfix.c          emit_error(file, READ_ERROR_CODE, "output write error");
emit_error       1089 contrib/tools/pngfix.c       emit_error(file, code, what);
emit_error       1258 contrib/tools/pngfix.c       emit_error(file, UNEXPECTED_ERROR_CODE, "file read");
emit_error       3177 contrib/tools/pngfix.c       emit_error(file, LIBPNG_WARNING_CODE, message);