Core/Game: Move singleton instances into compilation units

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

1 files changed, 6 insertions, 0 deletions

diff --git a/src/server/game/Calendar/CalendarMgr.cpp b/src/server/game/Calendar/CalendarMgr.cpp
index 83bcdf733e2..92df0ea6ea2 100644
--- a/src/server/game/Calendar/CalendarMgr.cpp
+++ b/src/server/game/Calendar/CalendarMgr.cpp
@@ -46,6 +46,12 @@ CalendarMgr::~CalendarMgr()
             delete *itr2;
 }
 
+CalendarMgr* CalendarMgr::instance()
+{
+    static CalendarMgr instance;
+    return &instance;
+}
+
 void CalendarMgr::LoadFromDB()
 {
     uint32 count = 0;