clang compiler warnings: Fix invalid enum conversion

This patch fixes some invalid enum conversion warnings caught by clang. In
particular, several functions in chan_sip mixed usage of the st_refresher_param
enum and st_refresher enum. This patch corrects that.

ASTERISK-24917
Reported by: dkdegroot
patches:
  rb4535.patch submitted by dkdegroot (License 6600)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@433746 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -1666,7 +1666,7 @@ static int  proc_session_timer(const void *vp);
 static void stop_session_timer(struct sip_pvt *p);
 static void start_session_timer(struct sip_pvt *p);
 static void restart_session_timer(struct sip_pvt *p);
-static const char *strefresherparam2str(enum st_refresher r);
+static const char *strefresherparam2str(enum st_refresher_param r);
 static int parse_session_expires(const char *p_hdrval, int *const p_interval, enum st_refresher_param *const p_ref);
 static int parse_minse(const char *p_hdrval, int *const p_interval);
 static int st_get_se(struct sip_pvt *, int max);
@@ -18868,12 +18868,12 @@ static const struct _map_x_s strefreshers[] = {
         { -1,                           NULL   },
 };
 
-static const char *strefresherparam2str(enum st_refresher r)
+static const char *strefresherparam2str(enum st_refresher_param r)
 {
 	return map_x_s(strefresher_params, r, "Unknown");
 }
 
-static enum st_refresher str2strefresherparam(const char *s)
+static enum st_refresher_param str2strefresherparam(const char *s)
 {
 	return map_s_x(strefresher_params, s, -1);
 }
@@ -21337,7 +21337,7 @@ static char *sip_show_channel(struct ast_cli_entry *e, int cmd, struct ast_cli_a
  					ast_cli(a->fd, "  S-Timer Peer Sts:       %s\n", cur->stimer->st_active_peer_ua ? "Active" : "Inactive");
  					ast_cli(a->fd, "  S-Timer Cached Min-SE:  %d\n", cur->stimer->st_cached_min_se);
  					ast_cli(a->fd, "  S-Timer Cached SE:      %d\n", cur->stimer->st_cached_max_se);
- 					ast_cli(a->fd, "  S-Timer Cached Ref:     %s\n", strefresherparam2str(cur->stimer->st_cached_ref));
+ 					ast_cli(a->fd, "  S-Timer Cached Ref:     %s\n", strefresher2str(cur->stimer->st_cached_ref));
  					ast_cli(a->fd, "  S-Timer Cached Mode:    %s\n", stmode2str(cur->stimer->st_cached_mode));
  				}
 			}