OTB_LOGGER_LEVEL prevent application to work correctly

Description

On windows (tried on windows 8) if you set the variable OTB_LOGGER_LEVEL to "INFO" for instance it prevents the application to work. The process is stalled without any log or info whatsoever...
On Linux if you set OTB_LOGGER_LEVEL to a wrong value (toto for instance) it is the same thing.

Steps to reproduce

Set the OTB_LOGGER_LEVEL to "" and try to launch an application.

Configuration information

On linux and windows

Other info

This has been reported by users on Discourse: Otb Segmentation