Codechange: Separate an assertion. More information if assert is triggered.

src/pathfinder/follow_track.hpp

@@ -73,7 +73,8 @@ struct CFollowTrackT
 
 	inline void Init(Owner o, RailTypes railtype_override, CPerformanceTimer *pPerf)
 	{
-		assert((!IsRoadTT() || m_veh != NULL) && (!IsRailTT() || railtype_override != INVALID_RAILTYPES));
+		assert(!IsRoadTT() || m_veh != NULL);
+		assert(!IsRailTT() || railtype_override != INVALID_RAILTYPES);
 		m_veh_owner = o;
 		m_pPerf = pPerf;
 		/* don't worry, all is inlined so compiler should remove unnecessary initializations */