name reference variables should not be checked for SC2178

[nilsonaj]

For bugs

• Rule Id (if any, e.g. SC1000): SC2178
• My shellcheck version (shellcheck --version or 'online'): online
• I tried on shellcheck.net and verified that this is still a problem on the latest commit
• It's not reproducible on shellcheck.net, but I think that's because it's an OS, configuration or encoding issue

For new checks and feature suggestions

• shellcheck.net (i.e. the latest commit) currently gives no useful warnings about this
• I searched through https://github.com/koalaman/shellcheck/issues and didn't find anything related

Here's a snippet or screenshot that shows the problem:

#!/usr/bin/env bash
function rmfg_get_info()
{
    local _hash_name_=${1}
    local -n _hash_name_ref_="${_hash_name_}"
    _hash_name_ref_["iface"]="eth0"
}


function rmfg_get_other_info()
{
    local _hash_name_=${1}
    local -n _hash_name_ref_="${_hash_name_}"
    _hash_name_ref_["iface"]="wlan0"
}
declare -xgA hash=()
declare -xgA other_hash=()
rmfg_get_info hash
rmfg_get_other_infh other_hash

Here's what shellcheck currently says:

Line 13	SC2178: Variable was used as an array but is now assigned a string.

Here's what I wanted or expected to see:

Since this variable is a reference, it should not be checked for this problem.