Fix include paths for TabletInput and add empty implementation for inhibitScreensaver on non-Apple platforms

osx/TabletInput_macos.mm

@@ -19,8 +19,8 @@
 
 #ifdef APPLE
 
-#include "TabletInput.h"
-#include "Log.h"
+#include "../src/TabletInput.h"
+#include "../src/Log.h"
 #import <Cocoa/Cocoa.h>
 
 TabletInput::TabletInput()

src/RenderingManager.cpp

@@ -163,6 +163,9 @@ void inhibitScreensaver (bool on)
         }
     }
 }
+#else
+void inhibitScreensaver (bool)
+{}
 #endif
 
 #ifdef USE_GST_OPENGL_SYNC_HANDLER