Fix bug where min transmit bitrate wasn't working

webrtc/call.h

Index: webrtc/call.h
diff --git a/webrtc/call.h b/webrtc/call.h
index f89af93b5152e5d81e24b0b75f37b9510dae07fd..457924a1f72290b5e7a615c5308d1b02e0821063 100644
--- a/webrtc/call.h
+++ b/webrtc/call.h
@@ -91,8 +91,9 @@ class Call {
   };
 
   struct Stats {
-    int send_bandwidth_bps = 0;
-    int recv_bandwidth_bps = 0;
+    int send_bandwidth_bps = 0;        // Estimated available send bandwidth.
+    int min_transmit_bitrate_bps = 0;  // Cumulative (configured) min bitrate.
+    int recv_bandwidth_bps = 0;        // Estimated available receive bandwidth.
     int64_t pacer_delay_ms = 0;
     int64_t rtt_ms = -1;
   };