[dev] Reverse commit to FBView.php

[Jason Rust]

When this commit:
http://cvs.horde.org/diff.php/kronolith/lib/FBView.php?r1=1.5&r2=1.6&ty=u

was made it seems to have broken the freebusy view.  Instead of showing each 
user's f/b info it only shows the info for the last user in the list.  
Assigning by reference seems to change reference to all the previous entries 
in  $_requiredMembers.  Perhaps a PHP bug (I am running 4.3.8)?  Exactly what 
happens is:
1st call to addRequiredMember($userA) and $_requiredMembers now looks like 
this (simplified):
array { 0 => array { user => "user A" } }
2nd call to addRequiredMember($userB) and it now looks like this:
array { 0 => array { user => "user B" }, 1 => array { user => "user B" } }

There doesn't seem to be any necessary reason for assigning the object by 
reference and reversing the above patch fixes the problem.

-Jason