fix bug in GlyphSet::DrawGlyph

regression from
    commit b157b82a6d924ebed1683b90bc9d59bbe2603451
	Date:   Thu Dec 8 04:13:26 2016 +0200
    Use GlyphItem in more places

found by my new unusedvariablesmore plugin

Change-Id: I195a084a2c524cda3f87703228365432c5681133
Reviewed-on: https://gerrit.libreoffice.org/52385
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Khaled Hosny <khaledhosny@eglug.org>
diff --git a/vcl/unx/generic/print/glyphset.cxx b/vcl/unx/generic/print/glyphset.cxx
index f90053b..9dacabb 100644
--- a/vcl/unx/generic/print/glyphset.cxx
+++ b/vcl/unx/generic/print/glyphset.cxx
@@ -192,7 +192,7 @@ void GlyphSet::DrawGlyph(PrinterGfx& rGfx,
    OString aGlyphSetName = GetGlyphSetName(nGlyphSetID);

    rGfx.PSSetFont  (aGlyphSetName, RTL_TEXTENCODING_DONTKNOW);
    rGfx.PSMoveTo   (rPoint);
    rGfx.PSMoveTo   (aPoint);
    rGfx.PSShowGlyph(nGlyphID);
}