Define Base.merge() and use it to merge _defaults in CharacterStyle.

src/core/Base.js

@@ -17,7 +17,6 @@
 // Extend Base with utility functions used across the library. Also set
 // this.Base, since bootstrap.js ommits that.
 this.Base = Base.inject({
-
 	/**
 	 * General purpose clone function that delegates cloning to the constructor
 	 * that receives the object to be cloned as the first argument.
@@ -100,6 +99,12 @@ this.Base = Base.inject({
 			}
 		},
 
+		merge: function(dest, src) {
+			return Base.each(src, function(value, key) {
+				this[key] = value;
+			}, dest);
+		},
+
 		/**
 		 * Capitalizes the passed string: hello world -> Hello World
 		 */

src/text/CharacterStyle.js

@@ -17,10 +17,10 @@
 var CharacterStyle = this.CharacterStyle = PathStyle.extend({
 	/** @lends CharacterStyle# */
 
-	_defaults: {
+	_defaults: Base.merge({
 		fontSize: 10,
 		font: 'sans-serif'
-	},
+	}, PathStyle.prototype._defaults),
 	_owner: TextItem,
 	_style: '_characterStyle'