Code: main(void)
{

    fwrite(signature, sizeof signature, 1, stdout);
    put_chunk(IHDR, sizeof IHDR);
 
   for(;;)
       put_chunk(unknown, sizeof unknown);
 }

Commit Message: DO NOT MERGE Update libpng to 1.6.20

BUG:23265085
Change-Id: I85199805636d771f3597b691b63bc0bf46084833
(cherry picked from commit bbe98b40cda082024b669fa508931042eed18f82)

CWE ID: 
main(void)
{

    fwrite(signature, sizeof signature, 1, stdout);
    put_chunk(IHDR, sizeof IHDR);
 
   for (;;)
       put_chunk(unknown, sizeof unknown);
 }
