Do not need to add default bodypref truncation for email collections.

...and in fact this can break loading large attachments when the client
requests mime data.

framework/Core/lib/Horde/Core/ActiveSync/Driver.php

@@ -1268,7 +1268,7 @@ public function getMessage($folderid, $id, array $collection)
                         'truncation' => !empty($collection['truncation'])
                             ? $collection['truncation']
                             : (!empty($collection['mimetruncation']) ? $collection['mimetruncation'] : false),
-                        'bodyprefs'  => $this->addDefaultBodyPrefTruncation($collection['bodyprefs']),
+                        'bodyprefs'  => $collection['bodyprefs'],
                         'mimesupport' => $collection['mimesupport']
                     )
                 );