[Openexr-user] openexr_viewers includes needed

[Bill Elswick]

While trying to compile openexr_viewers on Ubuntu 10.04.02, 
applyCTL.cpp fails to compile because 'sscanf' and 'getenv' are undefined.

I needed to add:
#include <stdio.lib>      // for sscanf
#include <stdlib.h>       // for getenv

Cheers,
--Bill