Patch: Improve error propagation from newMediaObject failure in xmlrpc.php

[redsweater]

I'm the developer of MarsEdit, a Mac desktop blogging application that works with WordPress. When my customers have trouble with the "upload image" functionality, the error responses from WordPress are lackluster. I tracked this down to a simple failure case in xmlrpc.php where the verbose error returned by wp_upload_bits is not being propagated out to the response text.

I'm attaching a proposed diff which addresses this. The diff is against /trunk/ as of today, but I would really love to see this integrated into the 2.1.x branch, because it will have a major impact on my customers' ability to debug MarsEdit interoperability with their WordPress blog.

Daniel Jalkut
Red Sweater Software

[redsweater]

Diffs to enhance verbose error propagation from newMediaObject failure.

[ryan]

(In [5054]) Improve error propagation from newMediaObject failure in xmlrpc.php. Props Daniel Jalkut (Red Sweater Software). fixes #3981 for 2.2

[ryan]

(In [5055]) Improve error propagation from newMediaObject failure in xmlrpc.php. Props Daniel Jalkut (Red Sweater Software). fixes #3981 for 2.1

[ryan]

This is a small, confined change so let's include it in 2.1.3. 2.1.3 RC2 is coming today. Let's make sure we test this out before 2.1.3 final.