Revert commit 9aab353, as it makes some tests to crash

Author: FrancescAlted

numexpr/module.cpp

@@ -47,13 +47,12 @@ void *th_worker(void *tidptr)
     char **errmsg;
     // For output buffering if needed
     vector<char> out_buffer;
-    int init_sentinels_done = 0;
 
     while (1) {
 
         /* Sentinels have to be initialised yet */
         if (tid == 0) {
-            init_sentinels_done = 0;
+            gs.init_sentinels_done = 0;
         }
 
         /* Meeting point for all threads (wait for initialization) */