MINOR: mux-h1: Be prepare to fail when EOM is added during trailers parsing

When trailers are parsed, we must add the corrresponsing HTX block and then we
must add the block end-of-message. But this last operation can failed because
there is not enough space the HTX message. This case was left aside till
now. Now, we stay in the state H1_MSG_TRAILERS with the warranty we will be able
to restart at the right stage.
1 file changed