Fix sending data to self.

[vehre]

coverage on master

Summary of changes

Correctly copy data when sending to this_image.

Rationale for changes

Sending data to this_image() lead to doing a memmove even when that was unsuitable, because size, rank, type, a.s.o. did not match. This patch directs all data sends to the convert routine, which does scalar to array and type/kind conversion correctly.

Additional info and certifications

This pull request (PR) is a:

• Bug fix
• Feature addition
• Other, Please describe:

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    OpenCoarrays developer a chance to review my proposed code
  • I have not introduced errant white space (no trailing white space or white space errors may
    be introduced)
  • I have added an explanation of what these changes do and why they should be included
  • I have checked to ensure there aren't other open Pull Requests for the same change
  • I have you written new tests for these changes
  • I have successfully tested these changes locally
  • I have commented any non-trivial, non-obvious code changes
  • The commits are logically atomic, self consistent and coherent
  • The commit messages follow best practices
  • Test coverage is maintained or increased after this is merged

Code coverage data

[zbeekman]

LGTM FWIW

[zbeekman]

LGTM