Fix progress display for inactive type axis values.

When type axis values were disabled they were still counted towards
a benchmark's total number of configs.

testing/benchmark.cu

@@ -286,6 +286,23 @@ void test_clone()
   ASSERT(clone->get_states().empty());
 }
 
+void test_get_config_count()
+{
+  lots_of_types_bench bench;
+  bench.set_type_axes_names({"Integer", "Float", "Other"});
+  bench.get_axes().get_type_axis(0).set_active_inputs({"I16", "I32"}); // 2,  2
+  bench.get_axes().get_type_axis(1).set_active_inputs({"F32", "F64"}); // 2,  4
+  bench.get_axes().get_type_axis(2).set_active_inputs({"bool"});       // 1,  4
+  bench.add_float64_axis("foo", {0.4, 2.3, 4.3});                      // 3, 12
+  bench.add_int64_axis("bar", {4, 6, 15});                             // 3, 36
+  bench.add_string_axis("baz", {"str", "ing"});                        // 2, 72
+  bench.add_string_axis("baz", {"single"});                            // 1, 72
+
+  ASSERT_MSG(bench.get_config_count() == 72,
+             "Got {}",
+             bench.get_config_count());
+}
+
 int main()
 {
   test_type_axes();
@@ -296,4 +313,5 @@ int main()
   test_string_axes();
   test_run();
   test_clone();
+  test_get_config_count();
 }