* please don't include headers in headers if not necessary

lib/IGameCallback.cpp

@@ -7,6 +7,7 @@
 #include "../hch/CArtHandler.h"
 #include "../hch/CSpellHandler.h"
 #include "../lib/VCMI_Lib.h"
+#include <boost/random/linear_congruential.hpp>
 
 /*
  * IGameCallback.cpp, part of VCMI engine

lib/IGameCallback.h

@@ -4,7 +4,6 @@
 #include "../global.h"
 #include <vector>
 #include <set>
-#include <boost/random/linear_congruential.hpp>
 #include "../client/FunctionList.h"
 
 /*