I think government of India will be happy to pay for the compensation.
Well, if the missile fell on any country other than Pak (like Nepal; Srilanka; Bangladesh), then by this time, that country would have got an apology + compensation......
But Pak is a different case altogether, I am not sure giving away compensation is that easy........there is a lonnngggg list of terror attacks on Indian soil that had Pak foot-prints.....mumbai attacks etc etc.