Fix typo

Change-Id: I9363004f30c6b49da7911ddf1e4bad468d7aa8b3
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/157555
Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>
diff --git a/vcl/headless/CairoCommon.cxx b/vcl/headless/CairoCommon.cxx
index 3c57f06..4d29e8a 100644
--- a/vcl/headless/CairoCommon.cxx
+++ b/vcl/headless/CairoCommon.cxx
@@ -775,7 +775,7 @@ void CairoCommon::drawLine(tools::Long nX1, tools::Long nY1, tools::Long nX2, to
    releaseCairoContext(cr, false, extents);
}

// true if we have a fill color and the line color is the same or non-existant
// true if we have a fill color and the line color is the same or non-existent
static bool onlyFillRect(const std::optional<Color>& rFillColor,
                         const std::optional<Color>& rLineColor)
{