Core/Spells: Fix a crash on checking school immunity added to unit manually (not by aura)

src/server/game/Spells/SpellInfo.h

@@ -41,6 +41,31 @@ enum SpellEffectTargetTypes
     SPELL_REQUIRE_GOBJECT,
 };
 
+enum SpellTargetReferenceTypes
+{
+    TARGET_REFERENCE_TYPE_CASTER,
+    TARGET_REFERENCE_TYPE_TARGET,
+    TARGET_REFERENCE_TYPE_SRC,
+    TARGET_REFERENCE_TYPE_DEST,
+};
+
+enum SpellTargetObjectTypes
+{
+    TARGET_OBJECT_TYPE_SRC,
+    TARGET_OBJECT_TYPE_DEST,
+    TARGET_OBJECT_TYPE_UNIT,
+    TARGET_OBJECT_TYPE_GAMEOBJECT,
+};
+
+enum SpellTargetSelectTypes
+{
+    TARGET_SELECT_TYPE_DEFAULT,
+    TARGET_SELECT_TYPE_CHANNEL,
+    TARGET_SELECT_TYPE_NEARBY,
+    TARGET_SELECT_TYPE_CONE,
+    TARGET_SELECT_TYPE_AREA,
+};
+
 enum SpellSelectTargetTypes
 {
     TARGET_TYPE_DEFAULT,