refactor: unhide base Init() in derived classes to fix virtual warning

Author: revmischa

src/libprojectM/Renderer/Backend/OpenGL/OpenGLCopyTexture.hpp

@@ -20,7 +20,12 @@ class OpenGLCopyTexture : public CopyTexture, public OpenGLRenderItem
     void InitVertexAttrib() override;
 
     // Mark override for clarity and to avoid hiding warnings
-    void Init() override { OpenGLRenderItem::Init(); }
+    void Init() override
+    {
+        OpenGLRenderItem::Init();
+    }
+
+    using OpenGLRenderItem::Init; // Unhide base Init() to avoid -Woverloaded-virtual warning
 
     void Draw(const std::shared_ptr<class Texture>& originalTexture,
               bool flipVertical = false, bool flipHorizontal = false) override;

src/libprojectM/Renderer/Backend/OpenGL/OpenGLPresetTransition.hpp

@@ -22,7 +22,12 @@ class OpenGLPresetTransition : public PresetTransition, public OpenGLRenderItem
     void InitVertexAttrib() override;
 
     // Mark override for clarity and to avoid hiding warnings
-    void Init() override { OpenGLRenderItem::Init(); }
+    void Init() override
+    {
+        OpenGLRenderItem::Init();
+    }
+
+    using OpenGLRenderItem::Init; // Unhide base Init() to avoid -Woverloaded-virtual warning
 
     void Draw(const Preset& oldPreset,
               const Preset& newPreset,

src/libprojectM/Renderer/Backend/OpenGL/OpenGLRenderItem.hpp

@@ -25,6 +25,7 @@ class OpenGLRenderItem : public ::libprojectM::Renderer::RenderItem
     void Init() override;
 
 protected:
+    using ::libprojectM::Renderer::RenderItem::Init; // Unhide base Init() to avoid -Woverloaded-virtual warning
     GLuint m_vboID{0};
     GLuint m_vaoID{0};
 };