Allow menu_block_fix_custom_menus() to work for all menus

In the .install file, there is a handy function called menu_block_fix_custom_menus(). It's invoked on hook_enable.

The problem is that currently the code only allows menu names with the actual word "menu-" in them.

See line 182:

if (!in_array($menu_name, $active_menus) && (strpos($menu_name, 'menu-') === 0)) {

If you are upgrading a site from Drupal 6 to Drupal 7, this is a problem, since your main navigation menu is likely called "primary-links".

Attached patch allows any menu to be set in the menu_default_active_menus variable.