Fix ViewAlias Body Accessor crash

[Kyle-Ye]

Close #581

[codecov]

Codecov Report

❌ Patch coverage is 29.41176% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 32.11%. Comparing base (d4a825d) to head (ea441f2).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ces/OpenSwiftUI/View/Configuration/ViewAlias.swift	29.41%	12 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #582      +/-   ##
==========================================
+ Coverage   31.37%   32.11%   +0.74%     
==========================================
  Files         526      526              
  Lines       30633    30650      +17     
==========================================
+ Hits         9610     9843     +233     
+ Misses      21023    20807     -216     

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