Fixed compilation without PCH enabled

please avoid to miss header files in your sources

src/scripts/Spells/spell_dk.cpp

@@ -18,6 +18,7 @@
 #include "SpellInfo.h"
 #include "Totem.h"
 #include "PetDefines.h"
+#include "UnitAI.h"
 
 enum DeathKnightSpells
 {

src/scripts/Spells/spell_druid.cpp

@@ -16,6 +16,7 @@
 #include "SpellScript.h"
 #include "SpellAuraEffects.h"
 #include "Containers.h"
+#include "GridNotifiers.h"
 
 enum DruidSpells
 {

src/scripts/Spells/spell_paladin.cpp

@@ -16,6 +16,7 @@
 #include "SpellScript.h"
 #include "SpellAuraEffects.h"
 #include "Group.h"
+#include "UnitAI.h"
 
 enum PaladinSpells
 {

src/scripts/Spells/spell_quest.cpp

@@ -19,6 +19,7 @@
 #include "GridNotifiers.h"
 #include "MapManager.h"
 #include "CreatureTextMgr.h"
+#include "SpellAuraEffects.h"
 
 // Ours
 class spell_q11065_wrangle_some_aether_rays : public SpellScriptLoader