my intent is to provide a define for cairo < 1.10.0

(cherry picked from commit bd781238696d99c2c9c7378c28435f08c3adf451)

Let's hope this fixes build on Linux-rpm_deb-x86@71-TDF

Change-Id: Ib102b257aa9bf183409c1ab99f61ee63d653cbed
diff --git a/vcl/headless/svpgdi.cxx b/vcl/headless/svpgdi.cxx
index 57cb68a..4c8ab5a4 100644
--- a/vcl/headless/svpgdi.cxx
+++ b/vcl/headless/svpgdi.cxx
@@ -141,6 +141,9 @@ void SvpSalGraphics::clipRegion(cairo_t* cr)
namespace
{
#if CAIRO_VERSION_MAJOR == 1 && CAIRO_VERSION_MINOR < 10

#define CAIRO_OPERATOR_DIFFERENCE (static_cast<cairo_operator_t>(23))

    struct cairo_rectangle_int_t
    {
        double x;