Bring back accidentally removed validity check in postprocessing (#2048)

* Bring back accidentally removed validity check in postprocessing

* log why

* typo

Author: knopers8

Framework/src/PostProcessingRunner.cxx

@@ -230,6 +230,16 @@ void PostProcessingRunner::reset()
 
 void PostProcessingRunner::updateValidity(const Trigger& trigger)
 {
+  if (!trigger.activity.mValidity.isValid()) {
+    ILOG(Warning, Devel) << "Not updating objects validity, because the provided trigger validity is invalid ("
+                         << trigger.activity.mValidity.getMin() << ", " << trigger.activity.mValidity.getMax() << ")" << ENDM;
+    return;
+  }
+  if (trigger.activity.mValidity == gFullValidityInterval) {
+    ILOG(Warning, Devel) << "Not updating objects validity, because the provided trigger validity covers the"
+                         << " maximum possible validity, which is unexpected" << ENDM;
+    return;
+  }
   if (!core::activity_helpers::onNumericLimit(trigger.activity.mValidity.getMin())) {
     mActivity.mValidity.update(trigger.activity.mValidity.getMin());
   }