ZP-795 add parentheses to be sure of what we want.

Released under the Affero GNU General Public License (AGPL) version 3.

src/backend/imap/imap.php

@@ -1192,7 +1192,7 @@ class BackendIMAP extends BackendDiff {
 
                             $attachment = new SyncBaseAttachment();
 
-                            $attachment->estimatedDataSize = isset($part->d_parameters['size']) ? $part->d_parameters['size'] : isset($part->body) ? strlen($part->body) : 0;
+                            $attachment->estimatedDataSize = isset($part->d_parameters['size']) ? $part->d_parameters['size'] : (isset($part->body) ? strlen($part->body) : 0);
 
                             $attachment->displayname = $attname;
                             $attachment->filereference = $folderid . ":" . $id . ":" . $i;
@@ -1213,7 +1213,7 @@ class BackendIMAP extends BackendDiff {
 
                             $attachment = new SyncAttachment();
 
-                            $attachment->attsize = isset($part->d_parameters['size']) ? $part->d_parameters['size'] : isset($part->body) ? strlen($part->body) : 0;
+                            $attachment->attsize = isset($part->d_parameters['size']) ? $part->d_parameters['size'] : (isset($part->body) ? strlen($part->body) : 0);
 
                             $attachment->displayname = $attname;
                             $attachment->attname = $folderid . ":" . $id . ":" . $i;