Dont worry about it mate, a one off shouldnt turn them hermie. You may get 1 or 2 seeds from it - but thats highly unlikely.

If your really worried and its not too late just adjust the light cycle by 2 hours now. I.E. if your lights stayed on till 10 instead of 8, just start the lights again at 10 and go from there.

P.S. Great looking buds there! keep it up. dont feed it anything for 7 days before the chop - then flush with 3 times the volume of the pot its in with fresh water - this gets rid of any salts / nutrients left in the soil and gets rid of the chemical taste from the buds.