Initialize mTextureSet in RenderItem
Initialize mTextureSet in RenderItem

Change-Id: Id0353acea6bb7efc4dfbdf914f5d8bfea99f0607
Signed-off-by: Seoyeon Kim <9d7945f986357c1681706fda3daa4250c146b2e7@samsung.com>

dalihub/dali-core,dalihub/dali-core,dalihub/dali-core,dalihub/dali-core