[kdelibs/arts] fix linking error when kdelibs are compiled without arts

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1185603 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

arts/knotify/CMakeLists.txt

@@ -46,6 +46,8 @@ set( ${target}_SRCS
 
 if( ARTS_FOUND )
   set( LIBS artskde-shared )
+else( ARTS_FOUND )
+  set( LIBS kdeui-shared )
 endif( ARTS_FOUND )
 
 tde_add_kpart( ${target} AUTOMOC