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/Movement/PathGenerator.cpp

@@ -33,6 +33,8 @@ PathGenerator::PathGenerator(const Unit* owner) :
     _endPosition(G3D::Vector3::zero()), _sourceUnit(owner), _navMesh(NULL),
     _navMeshQuery(NULL)
 {
+    memset(_pathPolyRefs, 0, sizeof(_pathPolyRefs));
+
     TC_LOG_DEBUG("maps", "++ PathGenerator::PathGenerator for %u \n", _sourceUnit->GetGUIDLow());
 
     uint32 mapId = _sourceUnit->GetMapId();