Merge pull request #4851 from protich/issue/pear-mimedecode

Mime Decode - Encoded chars

include/pear/Mail/mimeDecode.php

@@ -645,7 +645,10 @@ class Mail_mimeDecode extends PEAR
         $input = preg_replace("/=\r?\n/", '', $input);
 
         // Replace encoded characters
-		$input = preg_replace('/=([a-f0-9]{2})/ie', "chr(hexdec('\\1'))", $input);
+       $input = preg_replace_callback('/=([a-f0-9]{2})/i',
+               create_function('$matches',
+                   ' return chr(hexdec($matches[0]));'),
+               $input);
 
         return $input;
     }