Themes and Plugins pages don't check to see if file is readable

[masquerade]

Neither the themes or plugin information grabbing code use is_readable() before trying to open a file. This occurs in multiple places in admin-functions.php and can cause errors for files that are not readable by the webserver. I'll submit a patch tomorrow, unless someone beats me to it.

Note: This is not a dupe of #1370 , it points out problems beyond what's listed there.

[MikeLittle]

Patch file to resolve this issue

[MikeLittle]

I've attached a patch file to resolve this issue. It adds in the is_readable check for both theme files and plugin files.
The theme file check adds a message to the broken_themes array.

[ryan]

(In [3103]) Make sure plugins and themes are readable. Props Mike Little. fixes #1502

[(none)]

Milestone 2.0 deleted