- fixed compilation of POSIX targets

src/scripting/backend/vmbuilder.h:169:19: error: no member named 'function' in namespace 'std'

src/scripting/backend/vmbuilder.h

@@ -4,6 +4,7 @@
 #include "dobject.h"
 #include "vmintern.h"
 #include <vector>
+#include <functional>
 
 class VMFunctionBuilder;
 class FxExpression;