Core/Game: Move singleton instances into compilation units

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

(cherry picked from commit 329225b40d110bed634f8cd0a1ab5c6dc7bbbdd1)

1 files changed, 6 insertions, 0 deletions

diff --git a/src/server/game/Conditions/ConditionMgr.cpp b/src/server/game/Conditions/ConditionMgr.cpp
index 6da83aad1a8..50e3e64ea2c 100644
--- a/src/server/game/Conditions/ConditionMgr.cpp
+++ b/src/server/game/Conditions/ConditionMgr.cpp
@@ -928,6 +928,12 @@ bool ConditionMgr::IsObjectMeetingVendorItemConditions(uint32 creatureId, uint32
     return true;
 }
 
+ConditionMgr* ConditionMgr::instance()
+{
+    static ConditionMgr instance;
+    return &instance;
+}
+
 void ConditionMgr::LoadConditions(bool isReload)
 {
     uint32 oldMSTime = getMSTime();