Silence some url compilation warnings on systems without zlib

* url-http.el (url-handle-content-transfer-encoding):
* url-vars.el (url-mime-encoding-string): Silence compiler.

lisp/url/ChangeLog

+2013-09-13  Glenn Morris  <rgm@gnu.org>
+
+	* url-http.el (url-handle-content-transfer-encoding):
+	* url-vars.el (url-mime-encoding-string): Silence compiler.
+
 2013-08-14  Lars Magne Ingebrigtsen  <larsi@gnus.org>
 
 	* url-http.el (url-http-parse-headers): Always place point at the

lisp/url/url-http.el

@@ -861,7 +861,7 @@ should be shown to the user."
 (defun url-handle-content-transfer-encoding ()
   (let ((encoding (mail-fetch-field "content-encoding")))
     (when (and encoding
-	       (fboundp 'zlib-decompress-region)
+	       (fboundp 'zlib-available-p)
 	       (zlib-available-p)
 	       (equal (downcase encoding) "gzip"))
       (save-restriction

lisp/url/url-vars.el

@@ -210,7 +210,7 @@ Should be an assoc list of headers/contents.")
 
 (defvar url-request-method nil "The method to use for the next request.")
 
-(defvar url-mime-encoding-string (and (fboundp 'zlib-decompress-region)
+(defvar url-mime-encoding-string (and (fboundp 'zlib-available-p)
 				      (zlib-available-p)
 				      "gzip")
   "String to send in the Accept-encoding: field in HTTP requests.")