[horde] upgrade imp to 4.2

[Joe Fisher]

I'm getting the following errors:
Notice: Undefined index: cachejs in
/usr/local/cpanel/base/horde/imp/lib/IMP.php on line 1872

Notice: Undefined index: cachecss in
/usr/local/cpanel/base/horde/imp/lib/IMP.php on line 2021

And in compose:
Same thing

What should I do?

Joe