Core/Game: Move singleton instances into compilation units

* Fixes issues when building shared libraries
  (prevents gcc and clang from providing several instance)

2 files changed, 7 insertions, 5 deletions

diff --git a/src/server/game/Groups/GroupMgr.cpp b/src/server/game/Groups/GroupMgr.cpp
index 24d4983a1e0..c6046c3a9aa 100644
--- a/src/server/game/Groups/GroupMgr.cpp
+++ b/src/server/game/Groups/GroupMgr.cpp
@@ -92,6 +92,12 @@ ObjectGuid::LowType GroupMgr::GenerateGroupId()
     return NextGroupId++;
 }
 
+GroupMgr* GroupMgr::instance()
+{
+    static GroupMgr instance;
+    return &instance;
+}
+
 Group* GroupMgr::GetGroupByGUID(ObjectGuid const& groupId) const
 {
     GroupContainer::const_iterator itr = GroupStore.find(groupId.GetCounter());
diff --git a/src/server/game/Groups/GroupMgr.h b/src/server/game/Groups/GroupMgr.h
index 25dd1275908..d9f39c1fbd9 100644
--- a/src/server/game/Groups/GroupMgr.h
+++ b/src/server/game/Groups/GroupMgr.h
@@ -27,11 +27,7 @@ private:
     ~GroupMgr();
 
 public:
-    static GroupMgr* instance()
-    {
-        static GroupMgr instance;
-        return &instance;
-    }
+    static GroupMgr* instance();
 
     typedef std::map<ObjectGuid::LowType, Group*> GroupContainer;
     typedef std::vector<Group*>      GroupDbContainer;