minor change in how zlib is included in povmscpp.cpp
minor change in how zlib is included in povmscpp.cpp

corresponds to Perforce change 6080.

davidgiven/povray,UberPOV/UberPOV,LogicalKnight/povray,davidgiven/povray,LogicalKnight/povray,wfpokorny/povray,POV-Ray/povray,LogicalKnight/povray,LeForgeron/povray,BentSm/povray,davidgiven/povray,wfpokorny/povray,LeForgeron/povray,BentSm/povray,LeForgeron/povray,davidgiven/povray,FLOWERCLOUD/povray,FLOWERCLOUD/povray,LogicalKnight/povray,LogicalKnight/povray,davidgiven/povray,POV-Ray/povray,FLOWERCLOUD/povray,davidgiven/povray,davidgiven/povray,c-lipka/povray,POV-Ray/povray,FLOWERCLOUD/povray,LeForgeron/povray,wfpokorny/povray,POV-Ray/povray,LeForgeron/povray,LeForgeron/povray,c-lipka/povray,POV-Ray/povray,eblanca/povray,UberPOV/UberPOV,UberPOV/UberPOV,c-lipka/povray,LogicalKnight/povray,UberPOV/UberPOV,FLOWERCLOUD/povray,UberPOV/UberPOV,LogicalKnight/povray,eblanca/povray,BentSm/povray,POV-Ray/povray,FLOWERCLOUD/povray,POV-Ray/povray,wfpokorny/povray,wfpokorny/povray,LeForgeron/povray,davidgiven/povray,davidgiven/povray,eblanca/povray,BentSm/povray,wfpokorny/povray,FLOWERCLOUD/povray,LogicalKnight/povray,eblanca/povray,c-lipka/povray,FLOWERCLOUD/povray,LeForgeron/povray,wfpokorny/povray,FLOWERCLOUD/povray,LogicalKnight/povray,UberPOV/UberPOV,UberPOV/UberPOV