BACKENDS: Fix const'ness which led to warnings

2 files changed, 2 insertions, 2 deletions

diff --git a/backends/graphics/surfacesdl/surfacesdl-graphics.cpp b/backends/graphics/surfacesdl/surfacesdl-graphics.cpp
index 2b31e90352..692602bf07 100644
--- a/backends/graphics/surfacesdl/surfacesdl-graphics.cpp
+++ b/backends/graphics/surfacesdl/surfacesdl-graphics.cpp
@@ -706,7 +706,7 @@ const OSystem::GraphicsMode *SurfaceSdlGraphicsManager::getSupportedShaders() co
 	return s_supportedShaders;
 }
 
-int SurfaceSdlGraphicsManager::getShader() {
+int SurfaceSdlGraphicsManager::getShader() const {
 	return _currentShader;
 }
 
diff --git a/backends/graphics/surfacesdl/surfacesdl-graphics.h b/backends/graphics/surfacesdl/surfacesdl-graphics.h
index ef41b90f6c..fa130cd9a5 100644
--- a/backends/graphics/surfacesdl/surfacesdl-graphics.h
+++ b/backends/graphics/surfacesdl/surfacesdl-graphics.h
@@ -106,7 +106,7 @@ public:
 	virtual Common::List<Graphics::PixelFormat> getSupportedFormats() const;
 #endif
 	virtual const OSystem::GraphicsMode *getSupportedShaders() const;
-	virtual int getShader();
+	virtual int getShader() const;
 	virtual bool setShader(int id);
 	virtual void initSize(uint w, uint h, const Graphics::PixelFormat *format = NULL);
 	virtual int getScreenChangeID() const { return _screenChangeCount; }