BUG/MINOR: mux-h1: Be sure to update the count before adding EOM after trailers

Otherwise, an EOM may be added in a full buffer.

This patch must be backported to 2.0.

(cherry picked from commit f1ef7f641d8bc8de71394a84a46b70f74f30f565)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed