Duplicate declarations

[alexeagle]

goog.provide("goog.fx.dom");
goog.provide("goog.fx.dom.ColorTransform");

/** @type {number} */
goog.fx.dom.a = 1;

/** @constructor */
goog.fx.dom.ColorTransform = function() {}

we visit the ColorTransform symbol twice: once for the first provide (which is non-default so we traverse all the symbols) and again for the second provide, where it is the default.