Unbalanced stack in xterm+direct16

[Florian Weimer]

This termcap entry:

xterm+direct16|xterm with direct-color indexing,
        CO#16,
        setab=\E[%?%p1%{8}%<%t4%p1%d%e%?%p1%{16}%<%t%p1%{92}%+%e48:2
              ::%p1%{65536}%/%d:%p1%{256}%/%{255}%&%d:%p1%{255}%&%d
              %;%;m,
        setaf=\E[%?%p1%{8}%<%t3%p1%d%e%?%p1%{16}%<%t%p1%'R'%+%e38:2:
              :%p1%{65536}%/%d:%p1%{256}%/%{255}%&%d:%p1%{255}%&%d%;
              %;m,
        setb@, setf@, use=xterm+direct,

computes an integer values

  %p1%{92}%+

and

  %p1%'R'%+

on the stack without ever using it, resulting in an unbalanced stack
between the THEN/ELSE branches of the IF expression.  I suspect it's a
missing %d, but I have not tested this.