Fix: Try to load opus if it wasn't automatically loaded

This is necessary for musl-based systems like Alpine because ctypes.util.find_library('opus') will not find anything -- see https://bugs.python.org/issue21622 for more info

cogs/music.py

@@ -528,6 +528,11 @@ class Music(Cog):
 		# Ensure we are connected to voice
 		if not ctx.voice_client:
 			logger.warning("no voice client")
+			if not discord.opus.is_loaded():
+				try:
+					discord.opus.load_opus("/usr/lib/libopus.so")
+				except:
+					logger.error("opus could not be loaded!")
 			if ctx.author.voice:
 				logger.info(f"moving voice client to {ctx.author.voice.channel}")
 				await ctx.author.voice.channel.connect()