More protection for avoiding unnecessary thread re-initialization.
More protection for avoiding unnecessary thread re-initialization.

tectronics/numexpr,Alwnikrotikz/numexpr,ooguntola/numexpr,tectronics/numexpr,ooguntola/numexpr,ooguntola/numexpr,tectronics/numexpr,Alwnikrotikz/numexpr,Alwnikrotikz/numexpr