Rename SCRIPT_COMMAND_MOD_UPDATEFIELD to SCRIPT_COMMAND_SET_FLAG to avoid confusion.

Also add a parameter ´apply´ (dataint). If 1, it will set the flag, if 0, it will remove it.
Note: currently only supports 32bit integers.

--HG--
branch : trunk

src/game/Map.cpp

@@ -3939,7 +3939,10 @@ void Map::ScriptsProcess()
                     break;
                 }
                 
-                source->SetFlag(step.script->datalong, step.script->datalong2);
+                if (step.script->dataint)
+                    source->SetFlag(step.script->datalong, step.script->datalong2);
+                else
+                    source->RemoveFlag(step.script->datalong, step.script->datalong2);
                 break;
             }