Internet Bug Bounty: imagefilltoborder stackoverflow on truecolor images

Upstream Bug --- https://bugs.php.net/bug.php?id=72696 Summary -- Invalid color causes stack exhaustion by recursive call to function gdImageFillToBorder when the image used is truecolor. This was tested on a 64 bits platform. GDB debugging -- gdb -q --args /home/operac/php-70-sinasan/sapi/cli/ph...