*: change C-style prototypes, drop "(void)"

src/decoder/DecoderList.hxx

@@ -34,10 +34,12 @@ const struct DecoderPlugin *
 decoder_plugin_from_name(const char *name);
 
 /* this is where we "load" all the "plugins" ;-) */
-void decoder_plugin_init_all(void);
+void
+decoder_plugin_init_all();
 
 /* this is where we "unload" all the "plugins" */
-void decoder_plugin_deinit_all(void);
+void
+decoder_plugin_deinit_all();
 
 template<typename F>
 static inline const DecoderPlugin *

src/decoder/DecoderPlugin.hxx

@@ -50,7 +50,7 @@ struct DecoderPlugin {
 	 * Deinitialize a decoder plugin which was initialized
 	 * successfully.  Optional method.
 	 */
-	void (*finish)(void);
+	void (*finish)();
 
 	/**
 	 * Decode a stream (data read from an #InputStream object).