[openstreetmap/openstreetmap-website] Avoid testing against empty db queries (#2725)

[Andy Allan]

@gravitystorm pushed 1 commit.

47d11763fbe02ce1aa9470e33aabb151bef68297  Add some changsets that shouldn't be selected


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View it on GitHub:
https://github.com/openstreetmap/openstreetmap-website/pull/2725/files/e7dc2f2e554043b6feed226c577cf135728b74b9..47d11763fbe02ce1aa9470e33aabb151bef68297
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