Add a precompiled header for RELs (#2597)

src/d/d_lib.cpp

@@ -3,6 +3,8 @@
  * Utility Functions
  */
 
+#include "d/dolzel.h"
+
 #include "d/d_lib.h"
 #include "d/d_event.h"
 #include "d/d_stage.h"
@@ -306,4 +308,4 @@ void dLib_time_c::startTime() {
         m_diffTime += OSGetTime() - m_stopTime;
         m_timeStopped = false;
     }
-}
+}