Add test case for some, but not all PL values missing

Author: Will-Tyler

tests/data/vcf/local_alleles.vcf.gz

@@ -488,6 +488,10 @@ def test_call_LPL(self, ds):
                 [10, 40, 60, -2, -2, -2, -2, -2, -2, -2],
                 [10, 40, 60, -2, -2, -2, -2, -2, -2, -2],
             ],
+            [
+                [30, 30, 30, -2, -2, -2, -2, -2, -2, -2],
+                [30, -1, 0, -2, -2, -2, -2, -2, -2, -2],
+            ],
         ]
         nt.assert_array_equal(ds.call_LPL.values, call_LPL)