Remove useless return in a void function
diff --git a/poppler/SplashOutputDev.h b/poppler/SplashOutputDev.h
index 05b7e94..89655d6 100644
--- a/poppler/SplashOutputDev.h
+++ b/poppler/SplashOutputDev.h
@@ -20,7 +20,7 @@
 // Copyright (C) 2011 Andreas Hartmetz <ahartmetz@gmail.com>
 // Copyright (C) 2011 Andrea Canciani <ranma42@gmail.com>
 // Copyright (C) 2011, 2017 Adrian Johnson <ajohnson@redneon.com>
-// Copyright (C) 2012, 2015 Albert Astals Cid <aacid@kde.org>
+// Copyright (C) 2012, 2015, 2018 Albert Astals Cid <aacid@kde.org>
 // Copyright (C) 2015, 2016 William Bader <williambader@hotmail.com>
 //
 // To see a description of the changes please see the Changelog file that
@@ -154,7 +154,7 @@
    void getTriangle(int i, double *x0, double *y0, double *color0,
                             double *x1, double *y1, double *color1,
                             double *x2, double *y2, double *color2) override
-  { return shading->getTriangle(i, x0, y0, color0, x1, y1, color1, x2, y2, color2); }
+  { shading->getTriangle(i, x0, y0, color0, x1, y1, color1, x2, y2, color2); }
 
   void getParameterizedColor(double t, SplashColorMode mode, SplashColorPtr c) override;