Fix pako reference.

libs/modules/xmpp.bundle.js

 
         var content = JSON.stringify(data);
         if (deflate) {
-            content = String.fromCharCode.apply(null, Pako.deflate.deflateRaw(content));
+            content = String.fromCharCode.apply(null, Pako.deflateRaw(content));
         }
         content = Base64.encode(content);
         // XEP-0337-ish

modules/xmpp/xmpp.js

 
         var content = JSON.stringify(data);
         if (deflate) {
-            content = String.fromCharCode.apply(null, Pako.deflate.deflateRaw(content));
+            content = String.fromCharCode.apply(null, Pako.deflateRaw(content));
         }
         content = Base64.encode(content);
         // XEP-0337-ish