implement CM Re-Establish for voice calls

Related: SYS#5130
Change-Id: I6fa37d6ca9fcb1637742b40e37b68d67664c9b60
diff --git a/include/osmocom/msc/vlr.h b/include/osmocom/msc/vlr.h
index 3273333..f12e906 100644
--- a/include/osmocom/msc/vlr.h
+++ b/include/osmocom/msc/vlr.h
@@ -444,6 +444,7 @@
 	VLR_PR_ARQ_T_INVALID = 0, /* to guard against unset vars */
 	VLR_PR_ARQ_T_CM_SERV_REQ,
 	VLR_PR_ARQ_T_PAGING_RESP,
+	VLR_PR_ARQ_T_CM_RE_ESTABLISH_REQ,
 	/* FIXME: differentiate between services of 24.008 10.5.3.3 */
 };