Bug 1253499 - Fix VideoConduit's maxFps gtest. r=dminor

Differential Revision: https://phabricator.services.mozilla.com/D6151

--HG--
extra : moz-landing-system : lando

media/webrtc/signaling/gtest/videoconduit_unittests.cpp

@@ -377,7 +377,7 @@ TEST_F(VideoConduitTest, TestConfigureSendMediaCodecMaxFps)
 
   constraints.maxFps = 42;
   VideoCodecConfig codecConfig2(120, "VP8", constraints);
-  codecConfig.mSimulcastEncodings.push_back(encoding);
+  codecConfig2.mSimulcastEncodings.push_back(encoding);
   ec = mVideoConduit->ConfigureSendMediaCodec(&codecConfig2);
   ASSERT_EQ(ec, kMediaConduitNoError);
   mVideoConduit->StartTransmitting();