[FIX] Tiki fails to start when `system()` is disabled.
OCR code needs system()
and exec()
to be enabled in multiple
fucntions, this change tries to assure the library code will
only be called if the needed functions are enabled in the system.
OCR code needs system()
and exec()
to be enabled in multiple
fucntions, this change tries to assure the library code will
only be called if the needed functions are enabled in the system.