- bugfix in Format80

- fixed heisenburg-endianness in map loader
    - THERES A BUG in the mix loading; I need another 4 bytes padding to load temperat.mix and snow.mix (not interior.mix, though)
    - ShpViewer can now load and view map files
    - Copy TEMPERAT, SNOW, INFERIOR (sic) mixes into $(SolutionDir) for this to work
    - Left-click to reload tile-ID file, middle-click scrolls
    - the tile-id file has some collisions between tile-sets, be careful about ordering if you change anything


git-svn-id: svn://svn.ijw.co.nz/svn/OpenRa@1081 993157c7-ee19-0410-b2c4-bb4e9862e678

OpenRa.FileFormats/Terrain.cs

@@ -24,7 +24,7 @@ namespace OpenRa.FileFormats
 			Height = reader.ReadUInt16();
 
 			if( Width != 24 || Height != 24 )
-				throw new InvalidDataException();
+				throw new InvalidDataException( string.Format( "{0}x{1}", Width, Height ) );
 
 			NumTiles = reader.ReadUInt16();
 			reader.ReadUInt16();
@@ -58,7 +58,10 @@ namespace OpenRa.FileFormats
 
 		public Bitmap GetTile( int index )
 		{
-			return TileBitmaps[ index ];
+			if( index < TileBitmaps.Count )
+				return TileBitmaps[ index ];
+			else
+				return null;
 		}
 
 		public Bitmap[ , ] GetTiles( int tileNum )