texture listener was enabled only when the macro CC_ENABLE_CACHE_TEXTURE_DATA was enabled.

cocos/2d/CCTextureAtlas.cpp

@@ -52,6 +52,9 @@ TextureAtlas::TextureAtlas()
     ,_dirty(false)
     ,_texture(nullptr)
     ,_quads(nullptr)
+#if CC_ENABLE_CACHE_TEXTURE_DATA
+    ,_backToForegroundlistener(nullptr)
+#endif
 {}
 
 TextureAtlas::~TextureAtlas()

cocos/2d/CCTextureAtlas.h

@@ -238,7 +238,9 @@ protected:
     /** Quads that are going to be rendered */
     V3F_C4B_T2F_Quad* _quads;
     
+#if CC_ENABLE_CACHE_TEXTURE_DATA
     EventListenerCustom* _backToForegroundlistener;
+#endif
 };
 
 // end of textures group

cocos/2d/renderer/CCRenderer.cpp

@@ -47,7 +47,9 @@ Renderer::Renderer()
 ,_lastCommand(0)
 ,_numQuads(0)
 ,_glViewAssigned(false)
+#if CC_ENABLE_CACHE_TEXTURE_DATA
 ,_cacheTextureListener(nullptr)
+#endif
 {
     _commandGroupStack.push(DEFAULT_RENDER_QUEUE);