Fix recently introduced warnings in session.c
Fix recently introduced warnings in session.c

Use of tabs is fixed as well.
metalefty/xrdp,PKRoma/xrdp,neutrinolabs/xrdp,PKRoma/xrdp,cocoon/xrdp,PKRoma/xrdp,itamarjp/xrdp,moobyfr/xrdp,ubuntu-xrdp/xrdp,ubuntu-xrdp/xrdp,cocoon/xrdp,jsorg71/xrdp,moobyfr/xrdp,proski/xrdp,moobyfr/xrdp,itamarjp/xrdp,cocoon/xrdp,proski/xrdp,jsorg71/xrdp,jsorg71/xrdp,proski/xrdp,neutrinolabs/xrdp,ubuntu-xrdp/xrdp,itamarjp/xrdp,neutrinolabs/xrdp,metalefty/xrdp,metalefty/xrdp