We use color[9] in the error_box but it was not defined in the fallback colors.

We use color[9] in the error_box but it was not defined in the fallback colors.

BTW we need an sm_init which first of all defines fallback colors, then overrides
those with the user's/default colors. That would make sure that there are always
and everywhere fallback colors, and that incomplete themes would also have gaps
filled. Now that functionality is scattered.

git-svn-id: https://svn.code.sf.net/p/squirrelmail/code/trunk/squirrelmail@7746 7612ce4b-ef26-0410-bec9-ea0150e637f0