Fix displaying of multipart/alternative messages with empty parts (#1488750)

Conflicts:

	CHANGELOG

1 files changed, 4 insertions, 0 deletions

diff --git a/program/include/rcube_message.php b/program/include/rcube_message.php
index 745019e18..f5d253dc6 100644
--- a/program/include/rcube_message.php
+++ b/program/include/rcube_message.php
@@ -364,6 +364,10 @@ class rcube_message
             foreach ($structure->parts as $p => $sub_part) {
                 $sub_mimetype = $sub_part->mimetype;
 
+                // skip empty parts
+                if (!$sub_part->size)
+                    continue;
+
                 // check if sub part is
                 if ($sub_mimetype == 'text/plain')
                     $plain_part = $p;