glutMainLoopEvent not called due to uninitialized gr_frm_ctr_

[Kevin Chavez]

CRobotApp::init should set gr_frm_ctr_ to zero. This value is used to to call glutMainLoopEvent every so many iterations, however, since it not initialized, the value is unpredictable, and in some cases is a really large negative number, gr_frm_ctr_ <= gr_frm_skip_ is not true for a very long time--causing the graphics to 'hang.'

[Samir Menon]

Thanks for reporting. Will check it out.

[Samir Menon]

Fixed as of 152f994f656fb0a28527da5b0fa76c09a1e58723