Once again, here is the voting process at the security coucil.
They first vote for the Yes, then the abstention, and finally the NO.
Chirac has said that France could only vote NO. But this NO becomes automatically a veto if there is the majority of 9 YES.
Saying you are going to vote NO does not prevent the 14 others members to vote.
And if you look at the history of the UN, France has used its veto less than 20 times. The UK, around 50, and the USA, more than 75 times.
(I don't count USSR
but this proves that there have been at least 75 + 50 + 20=145 votes with a veto. But the resolutions have been proposed.
And as I said, it would have been a good way to show how France is isolated
From the leader of a Super power, I expect more than something like "I will loose this game, then I change the rules" or "I don't like it, then I don't play anymore"