Definition of "didnt"

“You didnt pack my garrison shoes?” he asked the footsteps. “I meant to tell you. They scuff so easy.” / “They’re on the bed, both pair,” the voice behind him said. “With the clean uniforms from your wall locker you didnt want to get mussed up. I pack your diddy box and extra hangers and your field shoes in the extra barricks bag.” / “Then I guess thats everything,” the young man said.

1951, James Jones, From Here to Eternity, New York, N.Y.: Charles Scribner’s Sons, page 4