Revise: the way of accessing the optVm's appData

[masatake]

No description provided.

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (0ae4783) 85.02% compared to head (c04c385) 85.05%.
Report is 5 commits behind head on master.

Files	Patch %	Lines
main/lregex.c	94.33%	3 Missing ⚠️
dsl/optscript.c	66.66%	1 Missing ⚠️
extra-cmds/optscript-repl.c	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3868      +/-   ##
==========================================
+ Coverage   85.02%   85.05%   +0.02%     
==========================================
  Files         228      228              
  Lines       53901    53960      +59     
==========================================
+ Hits        45832    45898      +66     
+ Misses       8069     8062       -7     

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