[clang] [llvm] Trying to fix undefined symbol error caused by iterator variable (PR #141507)

[Eli Friedman via cfe-commits]

https://github.com/efriedma-quic commented:

This looks basically right.  But I'm not sure all the conditions for calling it are correct. Is getDeclareMapperVarRef relevant?  Does it matter what scope we're inserting the variable into?  (Can the variable be inserted in a namespace?  Can it be a local variable?)

https://github.com/llvm/llvm-project/pull/141507