fix to marker's transform in cairo

cairo-mapnik-markers.diff

diff --git a/src/cairo_renderer.cpp b/src/cairo_renderer.cpp
index f238e4a..c6aaf62 100644
--- a/src/cairo_renderer.cpp
+++ b/src/cairo_renderer.cpp
@@ -1540,10 +1540,10 @@ void cairo_renderer_base::process(markers_symbolizer const& sym,
                 box2d<double> bbox = marker_ellipse.bounding_box();
                 coord2d center = bbox.center();
                 agg::trans_affine_translation recenter(-center.x, -center.y);
-                agg::trans_affine marker_trans = recenter * tr;
+                agg::trans_affine marker_trans = recenter * marker_tr;
 
                 dispatch_type dispatch(context, marker_ellipse, result?attributes:(*stock_vector_marker)->attributes(),
-                                       detector_, sym, bbox, marker_tr, scale_factor_);
+                                       detector_, sym, bbox, marker_trans, scale_factor_);
                 vertex_converter<box2d<double>, dispatch_type, markers_symbolizer,
                                  CoordTransform, proj_transform, agg::trans_affine, conv_types>
                     converter(query_extent_, dispatch, sym, t_, prj_trans, marker_tr, scale_factor_);