screen -c relative path bug

I must have recently upgraded to a new screen. My screenrc file was using the chdir directive so that the windows started inside would have a PWD I wanted them to. As soon as I tried to reconnect the screen session would die.

    screen -x
    Unable to open "screenrc"

I was able to find the bug on savannah that described the symptom quite well.

I then wrote a wrapper zsh function which fixes the problem:

    REAL_SCREEN=$(which screen)

    # convert the path passed via the -c parameter to an absolute one
    screen() {
            local max=$((${#argv}-1))
            for (( x=1 ; x<=$max ; x++ )) ; do
                    local flag="${argv[$x]}"
                    if [[ "x$flag" = "x-c" ]] ; then
                            local y=$(($x+1))
                            local word="${argv[$y]}"
                            if [[ "x${word[1]}" != 'x/' ]] ; then
                                    argv[$y]="$PWD/$word"
                            fi
                    fi
            done

            echo ${REAL_SCREEN} ${1+"$argv"}
            ${REAL_SCREEN} ${1+"$@"}
    }