[contrib] validate_failures.py: Print stats for --inverse_match

... to make result format consistent.

Change-Id: I560f9aefa7be611ae189782365309ce53a3fee05
diff --git a/contrib/testsuite-management/validate_failures.py b/contrib/testsuite-management/validate_failures.py
index 8c30b58..4ec5b37 100755
--- a/contrib/testsuite-management/validate_failures.py
+++ b/contrib/testsuite-management/validate_failures.py
@@ -617,7 +617,7 @@
     # but PASSed in actual set.
     actual_vs_expected, expected_vs_actual \
       = expected_vs_actual, actual_vs_expected
-    stats = None
+    stats.fails = len(expected)
 
   tests_ok = True
   if len(actual_vs_expected) > 0:
@@ -627,7 +627,7 @@
       PrintSummary(actual_vs_expected)
     tests_ok = False
 
-  if _OPTIONS.verbosity >= 1 and stats:
+  if _OPTIONS.verbosity >= 1:
     stats.Print()
 
   if _OPTIONS.verbosity >= 2 and len(expected_vs_actual) > 0: