rlc: Move the ack state array into a separate class that can be tested
diff --git a/src/rlc.cpp b/src/rlc.cpp
index 4319c49..1a2aa0f 100644
--- a/src/rlc.cpp
+++ b/src/rlc.cpp
@@ -31,3 +31,9 @@
 
 	return block;
 }
+
+void gprs_rlc_v_b::reset()
+{
+	for (size_t i = 0; i < ARRAY_SIZE(m_v_b); ++i)
+		mark_invalid(i);
+}