fix baseline build (old cairo) - 'cairo_rectangle_int_t' does not name a type

Change-Id: I723122069541bc5752164554e693268267969b1a
Reviewed-on: https://gerrit.libreoffice.org/20240Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>
Tested-by: Norbert Thiebaud <nthiebaud@gmail.com>
(cherry picked from commit 8375e386)

vcl/headless/svpgdi.cxx

@@ -135,6 +135,7 @@ void SvpSalGraphics::clipRegion(cairo_t* cr)
         cairo_clip(cr);
     }
 }
+#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 10, 0)
 namespace
 {
     cairo_rectangle_int_t getFillDamage(cairo_t* cr)
@@ -156,6 +157,7 @@ namespace
         return extents;
     }
 }
+#endif
 
 #endif