ReadCondHandle: suppress cppcheck false positive

Control/StoreGate/StoreGate/ReadCondHandle.h

@@ -95,6 +95,7 @@ namespace SG {
   ReadCondHandle<T>::ReadCondHandle(const SG::ReadCondHandleKey<T>& key):
   ReadCondHandle(key, Gaudi::Hive::currentContext())
   {
+    // cppcheck-suppress missingReturn; false positive
   }
 
   //---------------------------------------------------------------------------