vty: Change the return type from enum to int

clang complained that different enums are mixed with the
return type and we actually want this to be an int now.
diff --git a/openbsc/src/gprs/gb_proxy_main.c b/openbsc/src/gprs/gb_proxy_main.c
index 3da0abe..45b45a4 100644
--- a/openbsc/src/gprs/gb_proxy_main.c
+++ b/openbsc/src/gprs/gb_proxy_main.c
@@ -189,7 +189,7 @@
 
 extern void *tall_msgb_ctx;
 
-extern enum node_type bsc_vty_go_parent(struct vty *vty);
+extern int bsc_vty_go_parent(struct vty *vty);
 
 static struct vty_app_info vty_info = {
 	.name 		= "OsmoGbProxy",
diff --git a/openbsc/src/gprs/sgsn_main.c b/openbsc/src/gprs/sgsn_main.c
index 8cb7499..176501a 100644
--- a/openbsc/src/gprs/sgsn_main.c
+++ b/openbsc/src/gprs/sgsn_main.c
@@ -158,7 +158,7 @@
 extern struct gprs_ns_inst *bssgp_nsi;
 extern void *tall_msgb_ctx;
 
-extern enum node_type bsc_vty_go_parent(struct vty *vty);
+extern int bsc_vty_go_parent(struct vty *vty);
 
 static struct vty_app_info vty_info = {
 	.name 		= "OsmoSGSN",
diff --git a/openbsc/src/libcommon/common_vty.c b/openbsc/src/libcommon/common_vty.c
index 186fbe0..a0674f0 100644
--- a/openbsc/src/libcommon/common_vty.c
+++ b/openbsc/src/libcommon/common_vty.c
@@ -35,7 +35,7 @@
 #include <osmocom/vty/vty.h>
 
 
-enum node_type bsc_vty_go_parent(struct vty *vty)
+int bsc_vty_go_parent(struct vty *vty)
 {
 	switch (vty->node) {
 	case GSMNET_NODE:
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_main.c b/openbsc/src/osmo-bsc/osmo_bsc_main.c
index ee86cb6..3ab1267 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_main.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_main.c
@@ -142,7 +142,7 @@
 	}
 }
 
-extern enum node_type bsc_vty_go_parent(struct vty *vty);
+extern int bsc_vty_go_parent(struct vty *vty);
 
 static struct vty_app_info vty_info = {
 	.name 		= "OsmoBSC",
diff --git a/openbsc/src/osmo-bsc_mgcp/mgcp_main.c b/openbsc/src/osmo-bsc_mgcp/mgcp_main.c
index 1c03f27..daa07c2 100644
--- a/openbsc/src/osmo-bsc_mgcp/mgcp_main.c
+++ b/openbsc/src/osmo-bsc_mgcp/mgcp_main.c
@@ -184,7 +184,7 @@
 	return 0;
 }
 
-extern enum node_type bsc_vty_go_parent(struct vty *vty);
+extern int bsc_vty_go_parent(struct vty *vty);
 
 static struct vty_app_info vty_info = {
 	.name 		= "OpenBSC MGCP",
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat.c b/openbsc/src/osmo-bsc_nat/bsc_nat.c
index c70153f..56c6286 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_nat.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_nat.c
@@ -1587,7 +1587,7 @@
 	tall_ctr_ctx = talloc_named_const(tall_bsc_ctx, 0, "counter");
 }
 
-extern enum node_type bsc_vty_go_parent(struct vty *vty);
+extern int bsc_vty_go_parent(struct vty *vty);
 
 static struct vty_app_info vty_info = {
 	.name 		= "OsmoBSCNAT",
diff --git a/openbsc/src/osmo-nitb/bsc_hack.c b/openbsc/src/osmo-nitb/bsc_hack.c
index 75229b9..7229a9b 100644
--- a/openbsc/src/osmo-nitb/bsc_hack.c
+++ b/openbsc/src/osmo-nitb/bsc_hack.c
@@ -235,7 +235,7 @@
 
 void talloc_ctx_init(void);
 
-extern enum node_type bsc_vty_go_parent(struct vty *vty);
+extern int bsc_vty_go_parent(struct vty *vty);
 
 static struct vty_app_info vty_info = {
 	.name 		= "OpenBSC",