Bug fix for cases where the user has entered a first frame which is greater than the last frame.
Bug fix for cases where the user has entered a first frame which is greater than the last frame.

code-google-com/cortex-vfx,ruschelp/cortex-vfx,ruschelp/cortex-vfx,code-google-com/cortex-vfx,code-google-com/cortex-vfx,code-google-com/cortex-vfx,ruschelp/cortex-vfx