Fix bug that prevented regexes from being excluded in a FileList.

In exclude(), regexes were being categorized with other functions
(because their type is "function"), but they cannot be .apply()'d.
Now, objects must be both typeof "function" and have a .apply
member in order to be attached to the excludedProcs array.

lib/jake/filelist.js

@@ -187,7 +187,7 @@ FileList.prototype.exclude = function(/*Strings|Functions*/)
 {
     Array.prototype.forEach.call(arguments, function(/*String|Function*/ anObject)
     {
-        if (typeof anObject === "function")
+        if (typeof anObject === "function" && anObject.apply)
             this._excludedProcs.push(anObject);
 
         else