Contract but have't closed, realtor says a minor leak popped up

[William S.]

So like the title says, we agreed on a closing price, and got an executed contract to the bank. While bank and the lawyers are taking their dandy time, my realtor calls me to say the sell's agent found and fixed a small leak under the kitchen sink. I said thanks for letting me know and to proceed with the closing. My thinking is, get a closing date and demand a final walk through with a general contractor prior to signing. They will either find nothing, as the realtors are both saying, or they will find reason to investigate further or some obvious damage from water leaking in an unoccupied house.

My question is, what's the best way to handle this? It feels like I can either brush it off and close as planned (we're gonna gut the kitchen anyway) or try to turn this into a negotiation point to try and get some money back? 

Any thoughts or similar experiences or posts out there that I can learn from?