Add check for empty caller arguments in CHGBuilder::connectInheritEdgeViaCall

[mortkever]

Constructors or destructors does not necessarily have arguments. This causes an assertion error in getConstructorThisPtr where the arguments are queried. The result of getConstructorThisPtr is used to check if the "This" pointers are the same. And because the function connectInheritEdgeViaCall returns if this is not the case, we can simply return early and avoid the error.

For posterity: this issue arose when running SVF on 483.Xalancbmk for the destructor of XSLTinit.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 64.14%. Comparing base (85e1753) to head (f17b4e4).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1788      +/-   ##
==========================================
- Coverage   64.14%   64.14%   -0.01%     
==========================================
  Files         243      243              
  Lines       24624    24626       +2     
  Branches     4657     4658       +1     
==========================================
+ Hits        15796    15797       +1     
- Misses       8828     8829       +1     

Files with missing lines	Coverage Δ
svf-llvm/lib/CHGBuilder.cpp	83.39% <100.00%> (-0.24%)	⬇️

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