Bugfix: missing return in logger::attachStream()

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@87 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

code/DefaultLogger.cpp

@@ -169,6 +169,7 @@ void DefaultLogger::attachStream( LogStream *pStream, unsigned int severity )
 		if ( (*it)->m_pStream == pStream )
 		{
 			(*it)->m_uiErrorSeverity |= severity;
+			return;
 		}
 	}