decoder/{adplug,sidplay}: add missing "noexcept"

src/decoder/plugins/AdPlugDecoderPlugin.cxx

@@ -83,7 +83,7 @@ adplug_file_decode(DecoderClient &client, Path path_fs)
 
 static void
 adplug_scan_tag(TagType type, const std::string &value,
-		const TagHandler &handler, void *handler_ctx)
+		const TagHandler &handler, void *handler_ctx) noexcept
 {
 	if (!value.empty())
 		tag_handler_invoke_tag(handler, handler_ctx,
@@ -92,7 +92,7 @@ adplug_scan_tag(TagType type, const std::string &value,
 
 static bool
 adplug_scan_file(Path path_fs,
-		 const TagHandler &handler, void *handler_ctx)
+		 const TagHandler &handler, void *handler_ctx) noexcept
 {
 	CEmuopl opl(sample_rate, true, true);
 	opl.init();

src/decoder/plugins/SidplayDecoderPlugin.cxx

@@ -104,7 +104,7 @@ sidplay_init(const ConfigBlock &block)
 }
 
 static void
-sidplay_finish()
+sidplay_finish() noexcept
 {
 	delete songlength_database;
 }
@@ -442,7 +442,7 @@ ScanSidTuneInfo(const SidTuneInfo &info, unsigned track, unsigned n_tracks,
 
 static bool
 sidplay_scan_file(Path path_fs,
-		  const TagHandler &handler, void *handler_ctx)
+		  const TagHandler &handler, void *handler_ctx) noexcept
 {
 	const auto container = ParseContainerPath(path_fs);
 	const unsigned song_num = container.track;