It is extremely hard to find a full undamaged finger print, and even if by chance they did find one, it wont matter unless youve got some previous crime on your record and your prints are in the data base. And there isnt just a suitcase of csi shit in every cop car what usually happens is the normal cop will go to the scene first and then call in a forensics van with a police officer trained to take finger prints and look for evidence. Besides all this what cop is going to take prints from a pot? And with most outdoor growing its not the police you need to be afraid, of its the hikers who enjoy free weed.
Smoke a joint and relax.