tbf: Include CS into create_new_bsn log message

This change lets the test suite fail, so it get its own commit.

Sponsored-by: On-Waves ehf
diff --git a/src/tbf_dl.cpp b/src/tbf_dl.cpp
index 3f2ef22..c114869 100644
--- a/src/tbf_dl.cpp
+++ b/src/tbf_dl.cpp
@@ -396,11 +396,11 @@
 	const uint16_t bsn = m_window.v_s();
 	uint8_t cs = 1;
 
-	LOGP(DRLCMACDL, LOGL_DEBUG, "- Sending new block at BSN %d\n",
-		m_window.v_s());
-
 	cs = current_cs();
 
+	LOGP(DRLCMACDL, LOGL_DEBUG, "- Sending new block at BSN %d, CS=%d\n",
+		m_window.v_s(), cs);
+
 	OSMO_ASSERT(cs >= 1);
 	OSMO_ASSERT(cs <= 4);