Fix null<>nonnull w/Position

[swissiety]

No description provided.

[codecov]

Codecov Report

Patch coverage: 50.00% and project coverage change: +0.05% 🎉

Comparison is base (af2751c) 64.86% compared to head (70873ef) 64.92%.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop     #663      +/-   ##
=============================================
+ Coverage      64.86%   64.92%   +0.05%     
- Complexity      3369     3372       +3     
=============================================
  Files            313      313              
  Lines          14966    14961       -5     
  Branches        2527     2526       -1     
=============================================
+ Hits            9708     9713       +5     
+ Misses          4359     4349      -10     
  Partials         899      899              

Files Changed	Coverage Δ
...sootup/core/jimple/basic/FullStmtPositionInfo.java	20.00% <0.00%> (+3.33%)	⬆️
...ava/sootup/core/jimple/basic/StmtPositionInfo.java	40.00% <40.00%> (-4.45%)	⬇️
...otup/core/jimple/basic/SimpleStmtPositionInfo.java	87.50% <100.00%> (+33.65%)	⬆️
.../src/main/java/sootup/core/model/LinePosition.java	71.42% <100.00%> (+71.42%)	⬆️
...a/sourcecode/frontend/WalaIRToJimpleConverter.java	88.99% <100.00%> (ø)

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