[rsl] Improve error message when the lchan allocation is failing

openbsc/src/abis_rsl.c

@@ -1139,7 +1139,8 @@ static int rsl_rx_chan_rqd(struct msgb *msg)
 	/* check availability / allocate channel */
 	lchan = lchan_alloc(bts, lctype);
 	if (!lchan) {
-		fprintf(stderr, "CHAN RQD: no resources\n");
+		DEBUGP(DRSL, "CHAN RQD: no resources for %u 0x%x\n",
+			lctype, rqd_ref->ra);
 		/* FIXME: send some kind of reject ?!? */
 		return -ENOMEM;
 	}