[royce] 12848: fix gcc warning

fix gcc warning
Modified: branches/xmlbuildsystem/reactos/tools/rbuild/backend/backend.h
  _____

Modified: branches/xmlbuildsystem/reactos/tools/rbuild/backend/backend.h
--- branches/xmlbuildsystem/reactos/tools/rbuild/backend/backend.h
2005-01-06 03:49:38 UTC (rev 12847)
+++ branches/xmlbuildsystem/reactos/tools/rbuild/backend/backend.h
2005-01-06 03:52:12 UTC (rev 12848)
@@ -18,6 +18,7 @@

protected:

Factory ( const std::string& name_ );
+		virtual ~Factory() {}

virtual Backend* operator() ( Project& ) = 0;