修复talk模式对讲

src/main/java/com/genersoft/iot/vmp/media/zlm/ZLMRESTfulUtils.java

@@ -509,7 +509,9 @@ public class ZLMRESTfulUtils {
     }
 
     public ZLMResult<?> startSendRtpPassive(MediaServer mediaServer, Map<String, Object> param, ResultCallback callback) {
-        String response = sendPost(mediaServer, "startSendRtpPassive",param, (responseStr -> {
+        RequestCallback requestCallback = null;
+        if (callback != null) {
+            requestCallback = (responseStr -> {
                 if (callback == null) {
                     return;
                 }
@@ -523,7 +525,9 @@ public class ZLMRESTfulUtils {
                         callback.run(zlmResult);
                     }
                 }
-        }));
+            });
+        }
+        String response = sendPost(mediaServer, "startSendRtpPassive",param, requestCallback);
         if (response == null) {
             return ZLMResult.getFailForMediaServer();
         }else {