Also include values "0" in the reports

If no value is reported, then there wouldn't be a Result object, so a
value of 0 is valid.

Author: nomeata

codespeed/models.py

@@ -377,7 +377,7 @@ def get_changes_table(self, trend_depth=10, force_save=False):
             for bench in Benchmark.objects.filter(units_title=units_title):
                 units = bench.units
                 lessisbetter = bench.lessisbetter
-                resultquery = result_list.filter(benchmark=bench, value__gt=0)
+                resultquery = result_list.filter(benchmark=bench)
                 if not len(resultquery):
                     continue