fix When rendering a pass through a response, the callback never gets…

… called on success: assaf#12

lib/pass.js

@@ -257,17 +257,17 @@ Pass.prototype.pipe = function(output) {
       self.emit("error", lastError);
     } else {
       process.nextTick(function() {
+        zip.on("end", function() {
+          self.emit("end");
+        });
+        zip.on("error", function(error) {
+          self.emit("error", error);
+        });
         self.signZip(zip, manifest, function(error) {
           if (error) {
             return self.emit("error", error);
           }
           zip.close();
-          zip.on("end", function() {
-            self.emit("end");
-          });
-          zip.on("error", function(error) {
-            self.emit("error", error);
-          });
         });
       });
     }
@@ -342,6 +342,7 @@ Pass.prototype.signZip = function(zip, manifest, callback) {
     if (!error) {
       // Write signature file
       zip.addFile("signature").end(signature);
+      zip.emit("end");
     }
     callback(error);
   });