[glob2-devel] Bug in Map.cpp Checksum computation

[simon schuler]

The checksum computation here is almost useless: It returned the same 
value for over a minute, until i quit the game...

   Sint32 Map::checkSum(bool heavy)
   {
       Sint32 cs=size;
       if (heavy)
           for (int y=0; y<h; y++)
               for (int x=0; x<w; x++)
               {
                   ...
                   cs=(cs<<1)|(cs>>31);
               }
       return cs;
   }

The rotate Statement cs=(cs<<1)|(cs>>31); is wrong for signed integers 
and will overwrite the whole integer with 0xFFFFFFFF when cs is negative.
Game.cpp expects an Uint32 as return type anyway, so we just have to 
change the type of cs to Uint32,  and make Map::checkSum return an 
Uint32. After changing this, it returned usable values...

Simon