Fix construction time for Log & Sod Roof

Changed from 0 to 40 to match the regular roof construction time.
Merge pull request #7568 from Rivet-the-Zombie/even-moar-prices

A few more food price fixes.
Merge pull request #7575 from gcaliber/master

Fix construction time for Log & Sod Roof
More food price fixes.
Merge remote-tracking branch 'VlasovVitaly/master' into FrankenMod
Merge remote-tracking branch 'Rivet-the-Zombie/moar-fixes' into FrankenMod