IE8: getBBox returns orginal coordinates for a path after drag and setting new path. By @wyatte

dev/raphael.vml.js

@@ -171,6 +171,7 @@ window.Raphael && window.Raphael.vml && function(R) {
         "blur" in params && o.blur(params.blur);
         if (params.path && o.type == "path" || newpath) {
             node.path = path2vml(~Str(a.path).toLowerCase().indexOf("r") ? R._pathToAbsolute(a.path) : a.path);
+            o._.dirty = 1;
             if (o.type == "image") {
                 o._.fillpos = [a.x, a.y];
                 o._.fillsize = [a.width, a.height];