small optimization

bindings/python/mapnik_image.cpp

@@ -42,6 +42,5 @@ void export_image()
 	.def("width",&Image32::width)
 	.def("height",&Image32::height)
 	;    
-    
     def("rawdata",&rawdata);
 }

src/wkb.cpp

@@ -197,6 +197,7 @@ namespace mapnik
 	    int num_points=read_integer();
 	    CoordinateArray ar(num_points);
 	    read_coords(ar);
+	    line->set_capacity(num_points);
 	    line->move_to(ar[0].x,ar[0].y);
 	    for (int i=1;i<num_points;++i)
 	    {