Non-blocking domain updates bug fix

[rem1776]

Description
Initializes a logical array to false in the two non-blocking domain update routines. This fixes crashes and incorrect values from mpp_complete_update_domains by preventing unintentional updates from the undefined logical values.

Fixes #484

How Has This Been Tested?
Tested on amd with intel and gcc + impi, and with the domains tests enabled in #800

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules
• New check tests, if applicable, are included
• make distcheck passes