It's OK if it was corrected for. Some pilots like to run slow approaches, just above stall speed (PilotDAR on this forum I think being one proponent of them) and then a gust or slight shear can put you in the stall warning zone quite easily. It's normally just temporary and if you react accordingly, no problems.
I would probably not myself be that slow at that point in the circuit - in turns, the load factor goes up and so does the stall speed so it can be a bit close for comfort if the speed is too low. I like to carry a bit of extra speed and power-on approaches all the way down helps me make better landings and less choppy approaches.