Fix #2069 liv2d compile error

Author: halx99

extensions/Live2D/Framework/src/Rendering/axmol/CubismCommandBuffer_Cocos2dx.cpp

@@ -234,7 +234,7 @@ void CubismCommandBuffer_Cocos2dx::SetColorBuffer(backend::TextureBackend* color
         {
             rt = GetCocos2dRenderer()->getOffscreenRenderTarget();
             rt->setColorAttachment(colorBuffer);
-            rt->setTargetFlags(RenderTargetFlag::COLOR);
+            //rt->setTargetFlags(RenderTargetFlag::COLOR);
         }
         else
         {

extensions/Live2D/Framework/src/Rendering/axmol/CubismRenderer_Cocos2dx.cpp

@@ -656,7 +656,7 @@ void CubismRendererProfile_Cocos2dx::Save()
     // _lastRenderTargetFlag = GetCocos2dRenderer()->getRenderTargetFlag();
     // _lastColorBuffer  = nullptr; // unused
     _lastRenderTarget = GetCocos2dRenderer()->getRenderTarget();
-	_lastRenderTargetFlag = _lastRenderTarget->getTargetFlags();
+	//_lastRenderTargetFlag = _lastRenderTarget->getTargetFlags();
 	_lastColorBuffer  = _lastRenderTarget->_color[0].texture;
 	_lastDepthBuffer = _lastRenderTarget->_depth.texture;
 	_lastStencilBuffer = _lastRenderTarget->_stencil.texture;
@@ -684,7 +684,7 @@ void CubismRendererProfile_Cocos2dx::Restore()
 		restoringRT->setColorAttachment(_lastColorBuffer);
 		restoringRT->setDepthAttachment(_lastDepthBuffer);
         restoringRT->setStencilAttachment(_lastStencilBuffer);
-		restoringRT->setTargetFlags(_lastRenderTargetFlag);
+		// restoringRT->setTargetFlags(_lastRenderTargetFlag);
         cmd->func        = [=]() -> void {
             GetCocos2dRenderer()->setRenderTarget(restoringRT);
         };

extensions/Live2D/Framework/src/Rendering/axmol/CubismRenderer_Cocos2dx.hpp

@@ -366,7 +366,7 @@ class CubismRendererProfile_Cocos2dx
     backend::TextureBackend* _lastColorBuffer;                         ///< モデル描画直前のフレームバッファ
     backend::TextureBackend* _lastDepthBuffer;
     backend::TextureBackend* _lastStencilBuffer;
-    ax::RenderTargetFlag _lastRenderTargetFlag;
+    //ax::RenderTargetFlag _lastRenderTargetFlag;
     backend::RenderTarget* _lastRenderTarget;
     csmRectF _lastViewport;                 ///< モデル描画直前のビューポート
 };