Some smaller fixes to the vmapextractor courtesy of Lynx3d (not using corefunctions + update errormessages to use the new fileextensions)

--HG--
branch : trunk

src/server/collision/Maps/MapTree.cpp

@@ -16,7 +16,6 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
-#include "Errors.h"
 #include "MapTree.h"
 #include "ModelInstance.h"
 #include "VMapManager2.h"
@@ -27,6 +26,12 @@
 #include <iomanip>
 #include <limits>
 
+#ifndef NO_CORE_FUNCS
+    #include "Errors.h"
+#else
+    #define ASSERT(x)
+#endif
+
 using G3D::Vector3;
 
 namespace VMAP