fix rtcadapter handle leak (#680)

wuyongwen · web-flow · commit b626d73c798c · 2020-10-29T14:37:05.000+08:00
diff --git a/source/core/rtc_adapter/RtcAdapter.h b/source/core/rtc_adapter/RtcAdapter.h
@@ -85,6 +85,7 @@ class RtcAdapter {
     virtual void destoryAudioReceiver(AudioReceiveAdapter*) = 0;
     virtual AudioSendAdapter* createAudioSender(const Config&) = 0;
     virtual void destoryAudioSender(AudioSendAdapter*) = 0;
+    virtual ~RtcAdapter(){}
 };
 
 class RtcAdapterFactory {
