Bug 1168606 - Fix build bustages on ActorsParent.cpp. r=sgiesecke CLOSED TREE

--HG--
extra : amend_source : 571db2de04d434008bca03b2d69c350c0ed627a9

dom/indexedDB/ActorsParent.cpp

@@ -9389,6 +9389,7 @@ constexpr nsLiteralCString GetComparisonOperatorString(
     case ComparisonOperator::GreaterOrEquals:
       return NS_LITERAL_CSTRING(">=");
   }
+  MOZ_CRASH("Should never get here.");
 }
 
 nsAutoCString GetKeyClause(const nsCString& aColumnName,