(svn r15903) [0.7] -Backport from trunk:

- Fix: YAPF did not apply the platform length (too long/too short) penalties (r15900)
- Fix: Fixing the slopes was done a bit more often than intended making map generation with the original generator horribly slow (r15895)
- Fix: YAPF used different penalties for aqueducts than for other water tiles (r15891)
- Fix: Round the production rate up, so e.g. oilrigs always produce some passengers on lowest production level [FS#2772] (r15888)
- Fix: Libtimidity cannot handle frees of NULL (in contrast of most other frees) [FS#2770] (r15886)
- Fix: Make sure house class/ID counters do not overflow (r15831)

src/landscape.cpp

@@ -815,8 +815,6 @@ static void GenerateTerrain(int type, uint flag)
 			} while (--w != 0);
 			break;
 	}
-
-	FixSlopes();
 }
 
 
@@ -930,6 +928,7 @@ void GenerateLandscape(byte mode)
 		}
 	}
 
+	FixSlopes();
 	ConvertGroundTilesIntoWaterTiles();
 
 	if (_settings_game.game_creation.landscape == LT_TROPIC) CreateDesertOrRainForest();