2858: StratCon Tab NPE

[Windchild292]

This fixes a NPE that occurs when showing the StratCon state management, found in the logs for #2858

[codecov]

Codecov Report

Merging #2861 (0deb651) into master (5a23a6c) will decrease coverage by 0.01%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master    #2861      +/-   ##
============================================
- Coverage     10.64%   10.62%   -0.02%     
+ Complexity     3886     3875      -11     
============================================
  Files           721      721              
  Lines        100550   100552       +2     
  Branches      16415    16416       +1     
============================================
- Hits          10700    10685      -15     
- Misses        88470    88476       +6     
- Partials       1380     1391      +11     

Impacted Files	Coverage Δ
MekHQ/src/mekhq/gui/StratconTab.java	0.00% <0.00%> (ø)
...ekhq/campaign/universe/RandomFactionGenerator.java	56.17% <0.00%> (-2.00%)	⬇️
...ekHQ/src/mekhq/campaign/market/ContractMarket.java	58.60% <0.00%> (-1.00%)	⬇️
MekHQ/src/mekhq/campaign/universe/Systems.java	41.43% <0.00%> (-0.80%)	⬇️
.../mekhq/campaign/mission/enums/AtBContractType.java	12.54% <0.00%> (-0.70%)	⬇️
MekHQ/src/mekhq/campaign/universe/Faction.java	65.38% <0.00%> (-0.65%)	⬇️

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