PULLMAN, Wash. — Charlisse Leger-Walker scored 26 points, including the go-ahead basket in overtime, and No. 24 Washington State turned back Gonzaga 77-72 on Thursday night. The Cougars made 4 of 6 shots with a 3-pointer and free throw in the extra period while Gonzaga was limited to Kaylynne Truong’s free throws and 3. Kaylynne Truong and her twin sister …