Don't try and open font file if no name supplied. Ensure file is always closed.
Don't save script parameter set config file unless the value has changed. 
Prevents file from being saved every time ALT mode or main menu is exited.
Use open/write/close instead of fopen/fwrite/fclose for saving script parameter files and module logging.
Add 'fileio_semaphore' detection for VxWorks cameras (from srsa_4c).
Add 'fileio_semaphore' stub to VxWorks cameras (from srsa_4c).