GeneratorFilters: Fix cppcheck warning.

Suppress cppcheck false positive.

Generators/GeneratorFilters/src/BSignalFilter.cxx

@@ -235,6 +235,7 @@ StatusCode BSignalFilter::filterEvent()
 		  ATH_MSG_DEBUG(" *** BSignalFilter.cxx: B-signal found ***  ");
 		  ATH_MSG_DEBUG(" ------------------------------------------ ");
 		  ATH_MSG_DEBUG("");
+                  // cppcheck-suppress shiftNegative; false positive
 		  ATH_MSG_DEBUG(" Event " << m_EventCnt << " --> B-hadron/B-meson id " << particleID << " (" << HadronName << ") , status " << part->status());
 		  ATH_MSG_DEBUG("");