K.P.
This really depends on how old she is. If she needs "fuel" to get her through the night b/c she's still little and needing to eat every 3 or 4 hours, then do what you need to do to get some sleep!
If she's a little older, then I would suggest not "dream feeding" her b/c she needs to start establishing a sleep pattern and learning to get herself back to sleep! If she's feeding for comfort and soothing then try rubbing her back and talking quietly to her. If she's little and hungry, then feed her!