Case count for non-existing variant throws TypeError

[maehler]

Would it be reasonable to return inside the first if-statement (L131), or could this break something else?

loqusdb/loqusdb/commands/view.py

Lines 131 to 135 in 0b72a43

	if not variant:
	LOG.info("Variant {0} does not exist in database".format(variant_id))
	if case_count:
	variant["total"] = nr_cases