Hopefully fix Unix build error introduced with commit be34de4.
Hopefully fix Unix build error introduced with commit be34de4.

POV-Ray/povray,wfpokorny/povray,POV-Ray/povray,c-lipka/povray,wfpokorny/povray,wfpokorny/povray,eblanca/povray,LeForgeron/povray,LeForgeron/povray,LeForgeron/povray,eblanca/povray,BentSm/povray,LeForgeron/povray,wfpokorny/povray,eblanca/povray,c-lipka/povray,POV-Ray/povray,BentSm/povray,POV-Ray/povray,c-lipka/povray,c-lipka/povray,LeForgeron/povray,wfpokorny/povray,POV-Ray/povray,eblanca/povray,LeForgeron/povray,wfpokorny/povray,BentSm/povray,BentSm/povray,POV-Ray/povray,LeForgeron/povray,wfpokorny/povray,POV-Ray/povray,LeForgeron/povray