decoder/adplug: log version number

src/decoder/plugins/AdPlugDecoderPlugin.cxx

@@ -24,6 +24,7 @@
 #include "CheckAudioFormat.hxx"
 #include "fs/Path.hxx"
 #include "util/Error.hxx"
+#include "util/Domain.hxx"
 #include "util/Macros.hxx"
 #include "Log.hxx"
 
@@ -32,11 +33,16 @@
 
 #include <assert.h>
 
+static constexpr Domain adplug_domain("adplug");
+
 static unsigned sample_rate;
 
 static bool
 adplug_init(const config_param &param)
 {
+	FormatDebug(adplug_domain, "adplug %s",
+		    CAdPlug::get_version().c_str());
+
 	Error error;
 
 	sample_rate = param.GetBlockValue("sample_rate", 48000u);