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/Instances/InstanceSaveMgr.cpp b/src/server/game/Instances/InstanceSaveMgr.cpp
index 7d0c9241a51..fc65a1da82f 100644
--- a/src/server/game/Instances/InstanceSaveMgr.cpp
+++ b/src/server/game/Instances/InstanceSaveMgr.cpp
@@ -38,6 +38,12 @@ InstanceSaveManager::~InstanceSaveManager()
 {
 }
 
+InstanceSaveManager* InstanceSaveManager::instance()
+{
+    static InstanceSaveManager instance;
+    return &instance;
+}
+
 void InstanceSaveManager::Unload()
 {
     lock_instLists = true;