Use bool type instead of int in config field

Change-Id: Ie2624a6a6848c3c88deb39760317860d8074acb9
diff --git a/src/libosmo-mgcp/mgcp_osmux.c b/src/libosmo-mgcp/mgcp_osmux.c
index 06dc705..83a96fe 100644
--- a/src/libosmo-mgcp/mgcp_osmux.c
+++ b/src/libosmo-mgcp/mgcp_osmux.c
@@ -463,7 +463,7 @@
 		     osmo_sock_get_name2(osmux_fd.fd));
 		return ret;
 	}
-	cfg->osmux_init = 1;
+	cfg->osmux_init = true;
 
 	LOGP(DOSMUX, LOGL_INFO, "OSMUX socket listening on %s\n",
 		 osmo_sock_get_name2(osmux_fd.fd));