bitcomp.c: fix missing Doxygen group closing tag

Change-Id: I01f837ac4c8644c0851c77c3f42eb44353cef0d7
diff --git a/src/bitcomp.c b/src/bitcomp.c
index d5a9310..6f2fb62 100644
--- a/src/bitcomp.c
+++ b/src/bitcomp.c
@@ -351,4 +351,4 @@
 	return -1;
 }
 
-
+/*! @} */