Update variables.c

BasicOpenMP-HandsOn/variables.c

@@ -13,7 +13,7 @@ printf ("Serial var1= %d, &var1= %p\n",var1,&var1);
 #pragma omp parallel private(tid)
 {
 tid = omp_get_thread_num();
-var1 = tid; 
+ 
 printf ("Thread %d var1= %d, &var1= %p\n",tid,var1,&var1);
 }