mumble: fix build (#80500)

pkgs/applications/networking/mumble/default.nix

@@ -19,7 +19,9 @@ let
     pname = overrides.type;
     version = source.version;
 
-    patches = (source.patches or []) ++ optional jackSupport ./mumble-jack-support.patch;
+    patches = (source.patches or [])
+      ++ optional jackSupport ./mumble-jack-support.patch
+      ++ [ ./fix-rnnoise-argument.patch ];
 
     nativeBuildInputs = [ pkgconfig python qt5.qmake ]
       ++ (overrides.nativeBuildInputs or [ ]);

pkgs/applications/networking/mumble/fix-rnnoise-argument.patch

@@ -0,0 +1,16 @@
+nixpkgs has a more recent rnnoise than the one used by mumble, and rnnoise
+changed the argument rnnoise_create[1],
+
+[1] https://github.com/xiph/rnnoise/commit/231b9c02d14a74cb449a98004cb7a2cf1bdeca2f
+
+--- old/src/mumble/AudioInput.cpp	2020-02-18 22:55:32.000000000 -0500
++++ new/src/mumble/AudioInput.cpp	2020-02-18 22:58:08.000000000 -0500
+@@ -106,7 +106,7 @@
+ #endif
+ 
+ #ifdef USE_RNNOISE
+-	denoiseState = rnnoise_create();
++	denoiseState = rnnoise_create(NULL);
+ #endif
+ 
+ 	qWarning("AudioInput: %d bits/s, %d hz, %d sample", iAudioQuality, iSampleRate, iFrameSize);