Fix various compiler warnings all over the code
diff --git a/openbsc/src/e1_config.c b/openbsc/src/e1_config.c
index 9e191ba..958839d 100644
--- a/openbsc/src/e1_config.c
+++ b/openbsc/src/e1_config.c
@@ -106,7 +106,7 @@
 		oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML, trx,
 						  trx->rsl_tei, SAPI_OML);
 		if (!oml_link) {
-			LOGP(DINP, LOGL_ERROR, "TRX (%u/$u) OML link creation "
+			LOGP(DINP, LOGL_ERROR, "TRX (%u/%u) OML link creation "
 				"failed\n", trx->bts->nr, trx->nr);
 			return -ENOMEM;
 		}