refine response call, 2.0.24

@@ -922,9 +922,10 @@ int SrsRtmpConn::process_play_control_msg(SrsConsumer* consumer, SrsMessage* msg
     // @see https://github.com/winlinvip/simple-rtmp-server/issues/106
     // TODO: FIXME: response in right way, or forward in edge mode.
     SrsCallPacket* call = dynamic_cast<SrsCallPacket*>(pkt);
+    if (call) {
         // only response it when transaction id not zero,
         // for the zero means donot need response.
-    if (call && call->transaction_id > 0) {
+        if (call->transaction_id > 0) {
             SrsCallResPacket* res = new SrsCallResPacket(call->transaction_id);
             res->command_object = SrsAmf0Any::null();
             res->response = SrsAmf0Any::null();
@@ -932,6 +933,7 @@ int SrsRtmpConn::process_play_control_msg(SrsConsumer* consumer, SrsMessage* msg
                 srs_warn("response call failed. ret=%d", ret);
                 return ret;
             }
+        }
         return ret;
     }
     

@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR       2
 #define VERSION_MINOR       0
-#define VERSION_REVISION    23
+#define VERSION_REVISION    24
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"
 #define RTMP_SIG_SRS_ROLE "origin/edge server"