Core/Misc: Fix some static analysis issues

Fix some static analysis issues, mostly false positive about fields not initialized in the constructor. It's good practice anyway to always initialize them.

src/server/game/Entities/GameObject/GameObject.cpp

@@ -64,6 +64,7 @@ GameObject::GameObject() : WorldObject(false), MapObject(),
     lootingGroupLowGUID = 0;
 
     ResetLootMode(); // restore default loot mode
+    m_stationaryPosition.Relocate(0.0f, 0.0f, 0.0f, 0.0f);
 }
 
 GameObject::~GameObject()