loplugin:unused-returns in basegfx..cppcanvas

Change-Id: I32dc8c92871c8349651d2f4204a332d387e6e1b2
Reviewed-on: https://gerrit.libreoffice.org/48428
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 1 insertions, 3 deletions

diff --git a/include/cppcanvas/bitmap.hxx b/include/cppcanvas/bitmap.hxx
index 1e257d4dfb27..0dd3f69f3a84 100644
--- a/include/cppcanvas/bitmap.hxx
+++ b/include/cppcanvas/bitmap.hxx
@@ -54,10 +54,8 @@ namespace cppcanvas
             multiplied. For a normal, opaque bitmap, this will make
             the bitmap appear transparent with the given alpha value
             (value must be in the range [0,1]).
-
-            @return whether the rendering finished successfully.
          */
-        virtual bool                        drawAlphaModulated( double nAlphaModulation ) const = 0;
+        virtual void                        drawAlphaModulated( double nAlphaModulation ) const = 0;
 
         virtual BitmapCanvasSharedPtr       getBitmapCanvas() const = 0;