* Make the WPS parser close open conditionals on new sublines and comments as well as new lines.
* Make the displaying code check for invalid conditional constructs in order to avoid some rare cases of infinite looping.
* Make the WPS parser check that it doesn't read more strings than it can.
* Increase the string buffer size (from 512 to 1024, to accomodate the TextBox WPS which uses a lot of unicode characters).
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13162 a1c6a512-1295-4272-9138-f99709370657