Fix duals in a QP

[odow]

Closes #157

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.11 :tada:

Comparison is base (511ca58) 80.12% compared to head (390075e) 80.24%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #158 +/- ## ========================================== + Coverage 80.12% 80.24% +0.11% ========================================== Files 3 3 Lines 1545 1554 +9 ========================================== + Hits 1238 1247 +9 Misses 307 307 ``` | [Impacted Files](https://codecov.io/gh/jump-dev/HiGHS.jl/pull/158?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jump-dev) | Coverage Δ | | |---|---|---| | [src/MOI\_wrapper.jl](https://codecov.io/gh/jump-dev/HiGHS.jl/pull/158?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jump-dev#diff-c3JjL01PSV93cmFwcGVyLmps) | `91.42% <100.00%> (+0.06%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jump-dev). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jump-dev)

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