Misdemeanor Drug Conviction MT

Hello all,
I am a second year college student and am looking to transfer to CMA as an upper division student. 3.31 University GPA, 29 ACT, etc…however I received a 1 year deferred sentence for marijuana possession last spring. If I stay out of trouble until April the charge will be erased from my record. How will this affect my chances for acceptance?
Thanks for any input