Fix retrieval of disaggregated solution

[laradicp]

#564 (comment)

[codecov]

Codecov Report

Merging #578 (bf440f0) into master (6178b56) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #578   +/-   ##
=======================================
  Coverage   86.87%   86.87%           
=======================================
  Files          47       47           
  Lines        4723     4724    +1     
=======================================
+ Hits         4103     4104    +1     
  Misses        620      620           

Impacted Files	Coverage Δ
src/MOIwrapper.jl	85.92% <100.00%> (+0.03%)	⬆️

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