validate:launcher: Make sure to check string when verifying expected failures

The value can potentially be None and we should handle that

1 files changed, 1 insertions, 1 deletions

diff --git a/validate/launcher/baseclasses.py b/validate/launcher/baseclasses.py
index 73f0328..c39a426 100644
--- a/validate/launcher/baseclasses.py
+++ b/validate/launcher/baseclasses.py
@@ -711,7 +711,7 @@ class GstValidateTest(Test):
                 del expected_failure[key]
         for key, value in report.items():
             if key in expected_failure:
-                if not re.findall(expected_failure[key], value):
+                if not re.findall(expected_failure[key], str(value)):
                     return False
                 expected_failure.pop(key)