cChunk fix - setting a block to the same value doesn't mark chunk dirty (resulted in un-unloadable chunks) git-svn-id: http://mc-server.googlecode.com/svn/trunk@279 0a769ca7-a7f5-676a-18bf-c427514a06d6
git-svn-id: http://mc-server.googlecode.com/svn/trunk@251 0a769ca7-a7f5-676a-18bf-c427514a06d6
git-svn-id: http://mc-server.googlecode.com/svn/trunk@127 0a769ca7-a7f5-676a-18bf-c427514a06d6