I had a similar scenario come up a few weeks ago. I made a starter (from harvested yeast) on a Thursday, intending to brew that Friday with Saturday or Sunday being the fall back plan. That never happened, so I put my starter in the fridge and wound up using it the following Friday.
Normally, I'll make a 2 liter starter and I'll pitch the whole thing. This time, since it was cold in the fridge I wound up decanting off most of the beer and left just enough to re-suspend the yeast. I don't think it matters one way or the other as long as everything you have done remains clean and sanitary.
Also, for the record, the history of this yeast gives credit to your yeast being just fine. This was an old vial of WLP001 from the late spring/early summer (I forget the date, I just knew it was "old"). I used it to make a 1.073 IPA that went down to 1.010. I harvested that on 9/11/09. I made a starter from one of the mason jars on 10/1/09. I didn't get to use it until 10/9/09 to make a 1.054 APA that went down to 1.010. I harvested THAT yeast last night. I tasted the beer that I moved to my secondary and was very happy with the results and it should be a really nice APA.
I know this is all overkill, but, hopefully it gives you the reassurance that your yeast will be fine.