Fix a problem that occurs when mf_dotp is called by DFT+U with domain...
Description
Fix a problem that occurs when mf_dotp is called by DFT+U with domain parallelization, and when the domain has zero points to project on.
News snippet
Minor bugfix for DFT+U with domain parallelization.
Checklist
-
I have checked that my code follows the Octopus coding standards -
I have added tests for all the new features added in this request.