dry run with net new override segfault

[mfinelli]

[signal SIGSEGV: segmentation violation code]

goroutine 1 [running]:
github.com/mfinelli/modctl/internal/planner.(*PlanFile).Winner(...)
        github.com/mfinelli/modctl/internal/planner/planner.go:78
github.com/mfinelli/modctl/cmd.printApplyPlan({, ...}, ...}, ...)
        github.com/mfinelli/modctl/cmd/apply.go:582 +0x512
github.com/mfinelli/modctl/cmd.init.func107(?, {})
        github.com/mfinelli/modctl/cmd/apply.go:185 +0x6ac6
...
github.com/mfinelli/modctl/cmd.Execute()
        github.com/mfinelli/modctl/cmd/root.go:80 +0xd1
main.main()
        ./main.go:39 +0x87