staging: rtl8723bs: Fix dereference before check warning in os_dep/recv_linux.c

Smatch lists the following warning:

  CHECK   drivers/staging/rtl8723bs/os_dep/recv_linux.c
drivers/staging/rtl8723bs/os_dep/recv_linux.c:353 rtw_recv_indicatepkt() warn: variable dereferenced before check 'precv_frame' (see line 312)

This warning is fixed by removing the test at line 353.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/os_dep/recv_linux.c

@@ -350,8 +350,7 @@ int rtw_recv_indicatepkt(struct adapter *padapter, union recv_frame *precv_frame
 _recv_indicatepkt_drop:
 
 	 /* enqueue back to free_recv_queue */
-	 if (precv_frame)
-		 rtw_free_recvframe(precv_frame, pfree_recv_queue);
+	 rtw_free_recvframe(precv_frame, pfree_recv_queue);
 
 	 DBG_COUNTER(padapter->rx_logs.os_indicate_err);
 	 return _FAIL;