detect if arg is an empty file, returns 0 on sucess, 1 otherwise (bashfunction)

isemptyfile.bash

# detect if arg is an empty file, returns 0 on sucess, 1 otherwise
# @param string file 

function isemptyfile()
{   [ -z "$1" ] && return 1
    if [ -f "$1" ] && [ X"$(wc -c "$1" | cut -d" " -f1)" = X"0" ]; then
        return 0
    else
        return 1
    fi
}