add deconstructor to delete the shader program resource

includes/learnopengl/shader.h

@@ -96,6 +96,12 @@ class Shader
             glDeleteShader(geometry);
 
     }
+    // free the shader resource
+    // ------------------------------------------------------------------------
+    ~Shader()
+    {
+        glDeleteProgram(ID);
+    }
     // activate the shader
     // ------------------------------------------------------------------------
     void use() 

includes/learnopengl/shader_c.h

@@ -56,6 +56,12 @@ class ComputeShader
         // delete the shaders as they're linked into our program now and no longer necessary
         glDeleteShader(compute);
     }
+
+    // free the shader resource
+    ~ComputeShader()
+    {
+        glDeleteProgram(ID);
+    }
     // activate the shader
     // ------------------------------------------------------------------------
     void use() 

includes/learnopengl/shader_m.h

@@ -70,6 +70,12 @@ class Shader
         glDeleteShader(fragment);
 
     }
+    // free the shader resource
+    // ------------------------------------------------------------------------
+    ~Shader()
+    {
+        glDeleteProgram(ID);
+    }
     // activate the shader
     // ------------------------------------------------------------------------
     void use() const

includes/learnopengl/shader_s.h

@@ -68,7 +68,12 @@ class Shader
         glDeleteShader(vertex);
         glDeleteShader(fragment);
     }
-    // activate the shader
+    // free the shader resource
+    // ------------------------------------------------------------------------
+    ~Shader()
+    {
+        glDeleteProgram(ID);
+    }   // activate the shader
     // ------------------------------------------------------------------------
     void use() 
     { 

includes/learnopengl/shader_t.h

@@ -139,7 +139,12 @@ class Shader
         glDeleteShader(fragment);
         if(geometryPath != nullptr)
             glDeleteShader(geometry);
-
+    }
+    // free the shader resource
+    // ------------------------------------------------------------------------
+    ~Shader()
+    {
+        glDeleteProgram(ID);
     }
     // activate the shader
     // ------------------------------------------------------------------------