Fixed compilation without PCH enabled

please avoid to miss header files in your sources

src/scripts/Events/brewfest.cpp

@@ -1,6 +1,7 @@
 // Scripted by Xinef
 
 #include "ScriptMgr.h"
+#include "ScriptPCH.h"
 #include "ScriptedCreature.h"
 #include "ScriptedGossip.h"
 #include "SpellAuras.h"
@@ -1784,4 +1785,4 @@ void AddSC_event_brewfest_scripts()
 
     // beer effect
     new npc_brew_bubble();
-}
+}