Bugfix wrong use of qsort

- The qsort() function is defined as:
  void qsort(void *base, size_t nmemb, size_t size,
    int (*compar)(const void *, const void *));
  and sorts an array with nmemb elements of size size.
- in the gNB scheduling functions, nmemb and size were swapped
- this was causing a stack overflow ending with a SEGFAULT under certain circumstances

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c

@@ -628,7 +628,7 @@ void pf_dl(module_id_t module_id,
     }
   }
 
-  qsort(UE_sched, sizeof(*UE_sched), sizeofArray(UE_sched), comparator);
+  qsort(UE_sched, sizeofArray(UE_sched), sizeof(UEsched_t), comparator);
   UEsched_t *iterator = UE_sched;
 
   const int min_rbSize = 5;

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c

@@ -1705,7 +1705,7 @@ void pf_ul(module_id_t module_id,
     curUE++;
   }
 
-  qsort(UE_sched, sizeof(*UE_sched), sizeofArray(UE_sched), comparator);
+  qsort(UE_sched, sizeofArray(UE_sched), sizeof(UEsched_t), comparator);
   UEsched_t *iterator=UE_sched;
 
   /* Loop UE_sched to find max coeff and allocate transmission */