snapcast: remove leftover "libavahi-client" dependency

With "-DBUILD_WITH_AVAHI=OFF" the "libavahi-client" dependency is not
needed anymore. Instead, the "libexpat" dependency needs to be specified
explicitly.

Fixes: a9ac866 ("snapcast: fix PulseAudio")
Fixes: eeb8d13 ("snapcast: add package snapserver and snapclient")
Signed-off-by: Szabolcs Hubai <[email protected]>

Author: xabolcs

sound/snapcast/Makefile

@@ -27,7 +27,7 @@ define Package/snapcast/Default
   SECTION:=sound
   CATEGORY:=Sound
   TITLE:=Synchronous multiroom audio player
-  DEPENDS:=+AUDIO_SUPPORT:alsa-lib +libavahi-client +libatomic +libogg +libflac +libopus +boost +libsoxr
+  DEPENDS:=+AUDIO_SUPPORT:alsa-lib +libexpat +libatomic +libogg +libflac +libopus +boost +libsoxr
   URL:=https://github.com/badaix/snapcast
 endef