Use bool type instead of int in config field

Change-Id: Ie2624a6a6848c3c88deb39760317860d8074acb9

include/osmocom/mgcp/mgcp.h

@@ -164,7 +164,7 @@ struct mgcp_config {
 	/* The BSC-NAT may ask for enabling osmux on demand. This tells us if
 	 * the osmux socket is already initialized.
 	 */
-	int osmux_init;
+	bool osmux_init;
 	/* osmux batch factor: from 1 to 4 maximum */
 	int osmux_batch;
 	/* osmux batch size (in bytes) */

src/libosmo-mgcp/mgcp_osmux.c

@@ -463,7 +463,7 @@ int osmux_init(int role, struct mgcp_trunk *trunk)
 		     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));