Fixed building on newer GCC

src/servers/Server_Common/Util/UtilMath.cpp

@@ -1,4 +1,4 @@
-#include <math.h>
+#include <cmath>
 #include "UtilMath.h"
 
 float Core::Math::Util::distanceSq( float x, float y, float z, float x1, float y1, float z1 )

src/servers/Server_Zone/Actor/BattleNpc.cpp

@@ -2,6 +2,7 @@
 #include <stdlib.h>
 #include <time.h>
 #include <stdint.h>
+#include <cmath>
 
 #include <src/servers/Server_Common/Database/Database.h>
 #include <src/servers/Server_Common/Logging/Logger.h>

src/servers/Server_Zone/Actor/CalcBattle.cpp

@@ -3,6 +3,7 @@
 #include "CalcBattle.h"
 #include "Actor.h"
 #include "Player.h"
+#include <cmath>
 
 using namespace Core::Entity;