[Conkeror] [PATCH] fix describe_variable

[Nelson Elhage]

This looks like it was a copy/paste error copying from
describe_key_buffer.

commit 6e6fa2e9d7e8f92f23e742a5def4439de3048890
Author: Nelson Elhage <nelhage at mit.edu>
Date:   Wed Mar 19 11:36:39 2008 -0400

    Fix an error in describe_variable_buffer so that it actually works

diff --git a/modules/help.js b/modules/help.js
index f0136e3..2489962 100644
--- a/modules/help.js
+++ b/modules/help.js
@@ -423,7 +423,7 @@ function describe_variable_buffer(window, element) {
     special_buffer.call(this, window, element, forward_keywords(arguments));
     this.bindings = arguments.$bindings;
     this.variable = arguments.$variable;
-    this.cmd = interactive_variables.get(this.variable);
+    this.cmd = user_variables.get(this.variable);
     this.source_code_reference = this.cmd.source_code_reference;
     this.constructor_end();
 }