Use a for loop rather than for/in loop when copying events, so that code will work with an augmented Array.prototype. Fixes 7809.

test/unit/manipulation.js

@@ -1,5 +1,8 @@
 module("manipulation");
 
+// Ensure that an extended Array prototype doesn't break jQuery
+Array.prototype.arrayProtoFn = function(arg) { throw("arrayProtoFn should not be called"); };
+
 var bareObj = function(value) { return value; };
 var functionReturningObj = function(value) { return (function() { return value; }); };