fix infinite loop when calling "gu" with a {count}

TODO

@@ -14,6 +14,7 @@ BUGS:
      webpage, saving  only the html works just fine..
 - add window resize support to hints
 - can't reverse tab through the vimperator toolbar
+- gu doesn't work when the current URL contains a trailing slash
 
 FEATURES:
 9 :map commands to keys

chrome/content/vimperator/mappings.js

@@ -732,7 +732,7 @@ function Mappings() //{{{
             if (count < 1)
                 count = 1;
 
-            for (var i = 0; i < count - 1; i--)
+            for (var i = 0; i < count - 1; i++)
                 gocmd += "../";
 
             openURLs(gocmd);