[mkgmap-dev] Commit: r2981: Do not calc the area size on sea precompilation (now really :-).

Version mkgmap-r2981 was committed by wanmil on Thu, 23 Jan 2014 Do not calc the area size on sea precompilation (now really :-). In r2971 I errorneously thought that precompilation uses the SeaPolygonRelation.