tdf#42949 restore vcl/canvastools.hxx for OSL_DEBUG_LEVEL > 2

Change-Id: I6c69bcca4d5cd34efc297764d940727ef8631bf4
Reviewed-on: https://gerrit.libreoffice.org/81953
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
diff --git a/cppcanvas/source/mtfrenderer/transparencygroupaction.cxx b/cppcanvas/source/mtfrenderer/transparencygroupaction.cxx
index da046a8..09e5c20 100644
--- a/cppcanvas/source/mtfrenderer/transparencygroupaction.cxx
+++ b/cppcanvas/source/mtfrenderer/transparencygroupaction.cxx
@@ -50,6 +50,9 @@
#include "mtftools.hxx"
#include <cppcanvas/vclfactory.hxx>

#if OSL_DEBUG_LEVEL > 2
#include <vcl/canvastools.hxx>
#endif

using namespace ::com::sun::star;