disallow healing of unhealable entities via all ways

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@14084 3db68df2-c116-0410-a063-a993310a9797
Corsica and Sardinia skirmish map. Needs Iberian circuit wall.

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@14085 3db68df2-c116-0410-a063-a993310a9797
Fix building contstruction, but still don't allow positive regenrate for unhealable entities

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@14086 3db68df2-c116-0410-a063-a993310a9797
Merge 'remotes/trunk'