lisp/url/url-methods.el: Fix format error when http_proxy is empty string

2006-09-18  Michael Olson  <mwolson@gnu.org>

	* url-methods.el (url-scheme-register-proxy): Handle case where
	getenv returns an empty string for http_proxy.  This prevents an
	error when calling `format' later on.

--This line, and those below, will be ignored--
Files to commit:
   lisp/url/ChangeLog
   lisp/url/url-methods.el

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Revision: emacs@sv.gnu.org/emacs--devo--0--patch-441
Creator:  Michael Olson <mwolson@gnu.org>

lisp/url/ChangeLog

+2006-09-18  Michael Olson  <mwolson@gnu.org>
+
+	* url-methods.el (url-scheme-register-proxy): Handle case where
+	getenv returns an empty string for http_proxy.  This prevents an
+	error when calling `format' later on.
+
 2006-08-31  Diane Murray  <disumu@x3y2z1.net>
 
 	* url-parse.el (url-recreate-url-attributes): New function, code

lisp/url/url-methods.el

@@ -75,6 +75,11 @@
 	 (cur-proxy (assoc scheme url-proxy-services))
 	 (urlobj nil))
 
+    ;; If env-proxy is an empty string, treat it as if it were nil
+    (when (and (stringp env-proxy)
+	       (string= env-proxy ""))
+      (setq env-proxy nil))
+
     ;; Store any proxying information - this will not overwrite an old
     ;; entry, so that people can still set this information in their
     ;; .emacs file