mysys/my_thr_init.c  :  Avoid warnings of "unused variable" by extending a '#ifdef'.
mysys/my_thr_init.c  :  Avoid warnings of "unused variable" by extending a '#ifdef'.


mysys/my_thr_init.c:
  Enclose a variable declaration in the same '#ifdef' that also controls all access to the variable.
  This avoids warnings of "unused variable".

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