update

lopenglprogram.h

@@ -41,7 +41,7 @@ public:
   bool addShader(std::unique_ptr<LOpenGLShader> shader);
   void removeShader(GLuint id);
   void Create();
-  bool Link() const;
+  bool Link();
   void Use() const;
   bool Linked() const { return linked_; }
 
@@ -55,7 +55,7 @@ public:
 
 private:
   std::list<std::unique_ptr<LOpenGLShader>> shaderList_;
-  GLuint programId_;
-  bool linked_;
-  bool created_;
+  GLuint programId_ = 0;
+  bool linked_ = false;
+  bool created_ = false;
 };