5046 comstar: use the correct type instead of casting all the time

*** 196,207 ****
  volatile int stmf_min_nworkers = 4;
  volatile int stmf_worker_scale_down_delay = 20;
  
  /* === [ Debugging and fault injection ] === */
  #ifdef  DEBUG
! volatile int stmf_drop_task_counter = 0;
! volatile int stmf_drop_buf_counter = 0;
  
  #endif
  
  stmf_state_t            stmf_state;
  static stmf_lu_t        *dlun0;
--- 196,207 ----
  volatile int stmf_min_nworkers = 4;
  volatile int stmf_worker_scale_down_delay = 20;
  
  /* === [ Debugging and fault injection ] === */
  #ifdef  DEBUG
! volatile uint32_t stmf_drop_task_counter = 0;
! volatile uint32_t stmf_drop_buf_counter = 0;
  
  #endif
  
  stmf_state_t            stmf_state;
  static stmf_lu_t        *dlun0;
*** 4611,4622 ****
          }
          if (itask->itask_flags & ITASK_BEING_ABORTED)
                  return (STMF_ABORTED);
  #ifdef  DEBUG
          if (!(ioflags & STMF_IOF_STATS_ONLY) && stmf_drop_buf_counter > 0) {
!                 if (atomic_dec_32_nv((uint32_t *)&stmf_drop_buf_counter) ==
!                     1)
                          return (STMF_SUCCESS);
          }
  #endif
  
          stmf_update_kstat_lu_io(task, dbuf);
--- 4611,4621 ----
          }
          if (itask->itask_flags & ITASK_BEING_ABORTED)
                  return (STMF_ABORTED);
  #ifdef  DEBUG
          if (!(ioflags & STMF_IOF_STATS_ONLY) && stmf_drop_buf_counter > 0) {
!                 if (atomic_dec_32_nv(&stmf_drop_buf_counter) == 1)
                          return (STMF_SUCCESS);
          }
  #endif
  
          stmf_update_kstat_lu_io(task, dbuf);
*** 6340,6354 ****
                                  if (stmf_handle_cmd_during_ic(itask))
                                          break;
                          }
  #ifdef  DEBUG
                          if (stmf_drop_task_counter > 0) {
!                                 if (atomic_dec_32_nv((uint32_t *)&stmf_drop_task_counter) ==
!                                     1) {
                                          break;
                                  }
-                         }
  #endif
                          DTRACE_PROBE1(scsi__task__start, scsi_task_t *, task);
                          lu->lu_new_task(task, dbuf);
                          break;
                  case ITASK_CMD_DATA_XFER_DONE:
--- 6339,6351 ----
                                  if (stmf_handle_cmd_during_ic(itask))
                                          break;
                          }
  #ifdef  DEBUG
                          if (stmf_drop_task_counter > 0) {
!                                 if (atomic_dec_32_nv(&stmf_drop_task_counter) == 1)
                                          break;
                          }
  #endif
                          DTRACE_PROBE1(scsi__task__start, scsi_task_t *, task);
                          lu->lu_new_task(task, dbuf);
                          break;
                  case ITASK_CMD_DATA_XFER_DONE: