[fix] fix a JSON stat bug.

Author: winshining

ngx_rtmp_stat_module.c

@@ -507,7 +507,6 @@ ngx_rtmp_stat_live(ngx_http_request_t *r, ngx_chain_t ***lll,
     ngx_int_t                       n;
     ngx_uint_t                      nclients, total_nclients;
     ngx_uint_t                      f;
-    ngx_flag_t                      prev;
     u_char                          buf[NGX_INT_T_LEN];
     u_char                          bbuf[NGX_INT32_LEN];
     ngx_rtmp_stat_loc_conf_t       *slcf;
@@ -528,16 +527,11 @@ ngx_rtmp_stat_live(ngx_http_request_t *r, ngx_chain_t ***lll,
 
     total_nclients = 0;
     for (n = 0; n < lacf->nbuckets; ++n) {
-        prev = 0;
-        if (n && lacf->streams[n - 1]) {
-            prev = 1;
-        }
-
         for (stream = lacf->streams[n]; stream; stream = stream->next) {
             if (slcf->format & NGX_RTMP_STAT_FORMAT_XML) {
                 NGX_RTMP_STAT_L("<stream>\r\n");
             } else {
-                if (prev || stream->next) {
+                if (total_nclients || stream->next) {
                     NGX_RTMP_STAT_L(",");
                 }
 
@@ -897,7 +891,6 @@ ngx_rtmp_stat_play(ngx_http_request_t *r, ngx_chain_t ***lll,
     ngx_rtmp_play_ctx_t            *ctx, *sctx;
     ngx_rtmp_session_t             *s;
     ngx_uint_t                      n, nclients, total_nclients;
-    ngx_flag_t                      prev;
     u_char                          buf[NGX_INT_T_LEN];
     u_char                          bbuf[NGX_INT32_LEN];
     ngx_rtmp_stat_loc_conf_t       *slcf;
@@ -917,19 +910,14 @@ ngx_rtmp_stat_play(ngx_http_request_t *r, ngx_chain_t ***lll,
 
     total_nclients = 0;
     for (n = 0; n < pacf->nbuckets; ++n) {
-        prev = 0;
-        if (n && pacf->ctx[n - 1]) {
-            prev = 1;
-        }
-
         for (ctx = pacf->ctx[n]; ctx; ) {
             if (slcf->format & NGX_RTMP_STAT_FORMAT_XML) {
                 NGX_RTMP_STAT_L("<stream>\r\n");
                 NGX_RTMP_STAT_L("<name>");
                 NGX_RTMP_STAT_ECS(ctx->name);
                 NGX_RTMP_STAT_L("</name>\r\n");
             } else {
-                if (prev || ctx->next) {
+                if (total_nclients || ctx->next) {
                     NGX_RTMP_STAT_L(",");
                 }