United States v. Alvarez-Hernandez, __ F.3d __, 2007 WL 601991 (9th Cir. Feb. 28, 2007) (a sentence that has been suspended in full [i.e. defendant served no time in prison] does not trigger 12 level sentence enhancement under U.S.S.G. 2L1.2(b)(1)(B), for having a previous conviction for "a felony drug trafficking offense for which the sentence imposed was 13 months or less").