fix(ENHANCD_ARG_HOME): keep cd when set

[dezza]

WHAT

Checks if $ENHANCD_ARG_HOME is configured. If there is zero args it won't trigger on cd as documented.

Before this PR $ENHANCD_ARG_HOME would not prevent cd triggering the interactive filter list, despite being documented.

Follows the similar documented behaviour of the other settings.

WHY

It is a bug. It is already documented behaviour:

enhancd/README.md

Lines 538 to 545 in 5afb4eb

	<summary><strong><code>ENHANCD_ARG_HOME</code></strong></summary>
	You can customize to trigger the argumentless `cd` behavior by giving the string specified by this environment variable as an argument. Default is empty string.
	If you set this variable any but empty string, it gives you the behavior of `cd` with no argument; i.e. backward search of the whole directory-change history.
	Then `cd` with no argument changes current directory to `$HOME` without interactive filter.
	In other words, you can keep original behavior of `cd` with no argument by setting this option.

Last line confirms this.

enhancd/README.md

Line 545 in 5afb4eb

In other words, you can keep original behavior of `cd` with no argument by setting this option.

[dezza]

@babarot you seeing this?