find_multi_slots: Mark mslot_class properties const

This way it's clear for reader that those variables are never touched
during the function.

Change-Id: Ief038c75bc02d0e987135f29599014eab88447dd
diff --git a/src/gprs_rlcmac_ts_alloc.cpp b/src/gprs_rlcmac_ts_alloc.cpp
index 1645b87..cb054cd 100644
--- a/src/gprs_rlcmac_ts_alloc.cpp
+++ b/src/gprs_rlcmac_ts_alloc.cpp
@@ -516,10 +516,10 @@
  */
 int find_multi_slots(struct gprs_rlcmac_trx *trx, uint8_t mslot_class, uint8_t *ul_slots, uint8_t *dl_slots)
 {
-	uint8_t Rx = mslot_class_get_rx(mslot_class),   /* Max number of Rx slots */
-		Tx = mslot_class_get_tx(mslot_class),   /* Max number of Tx slots */
-		Sum = mslot_class_get_sum(mslot_class), /* Max number of Tx + Rx slots */
-		max_slots, num_rx, num_tx, mask_sel, pdch_slots, ul_ts, dl_ts;
+	const uint8_t Rx = mslot_class_get_rx(mslot_class),   /* Max number of Rx slots */
+		      Tx = mslot_class_get_tx(mslot_class),   /* Max number of Tx slots */
+		      Sum = mslot_class_get_sum(mslot_class); /* Max number of Tx + Rx slots */
+	uint8_t max_slots, num_rx, num_tx, mask_sel, pdch_slots, ul_ts, dl_ts;
 	int16_t rx_window, tx_window;
 	char slot_info[9] = {0};
 	int max_capacity = -1;