test: Fix the compilation of the test

This test didn't compile as it called the wrong method. It is a
manual test anyway and tend to bitrot. I didn't execute the
resulting test binary. Hmm, now I did and it segfaults on something
that appears to have been introduced a long time ago. Manual
tests are as good as no tests (besides they take more time than
writing no test). ;)
diff --git a/tests/e1inp_ipa_bts_test.c b/tests/e1inp_ipa_bts_test.c
index 5798d00..28e07ab 100644
--- a/tests/e1inp_ipa_bts_test.c
+++ b/tests/e1inp_ipa_bts_test.c
@@ -71,7 +71,7 @@
 			/* Now we can send OML messages to the BSC. */
 			bts_state = BTS_TEST_OML_SIGN_LINK_UP;
 		}
-		e1inp_ipa_bts_rsl_connect(line, "127.0.0.1", IPA_TCP_PORT_RSL, 0);
+		e1inp_ipa_bts_rsl_connect_n(line, "127.0.0.1", IPA_TCP_PORT_RSL, 0);
 		break;
 	case E1INP_SIGN_RSL:
 		LOGP(DBTSTEST, LOGL_NOTICE, "RSL link up request received.\n");