fix little sneaky bug in input framework with an edge case.

An assertion would trigger in the case when a predicate refuses
a new entry and another entry with the same index elements was
already in the table. (I thought that code block was unreachable
... did not think of this case).

testing/btest/Baseline/scripts.base.frameworks.input.predicaterefusesecondsamerecord/out

@@ -0,0 +1,3 @@
+{
+[1.228.83.33] = [asn=9318 HANARO-AS Hanaro Telecom Inc., severity=medium, confidence=95, detecttime=1342569600.0]
+}