renamed decoder plugin "mpc" to "mpcdec"

src/Makefile.am

@@ -271,7 +271,7 @@ mpd_SOURCES += decoder/mad_plugin.c
 endif
 
 if HAVE_MPCDEC
-mpd_SOURCES += decoder/mpc_plugin.c
+mpd_SOURCES += decoder/mpcdec_plugin.c
 endif
 
 if HAVE_WAVPACK

src/decoder/mpc_plugin.c → src/decoder/mpcdec_plugin.c

@@ -265,7 +265,7 @@ static struct tag *mpcTagDup(const char *file)
 
 static const char *const mpcSuffixes[] = { "mpc", NULL };
 
-const struct decoder_plugin mpcPlugin = {
+const struct decoder_plugin mpcdec_decoder_plugin = {
 	.name = "mpc",
 	.stream_decode = mpc_decode,
 	.tag_dup = mpcTagDup,

src/decoder_list.c

@@ -33,7 +33,7 @@ extern const struct decoder_plugin oggflac_decoder_plugin;
 extern const struct decoder_plugin audiofilePlugin;
 extern const struct decoder_plugin mp4ff_decoder_plugin;
 extern const struct decoder_plugin faad_decoder_plugin;
-extern const struct decoder_plugin mpcPlugin;
+extern const struct decoder_plugin mpcdec_decoder_plugin;
 extern const struct decoder_plugin wavpack_plugin;
 extern const struct decoder_plugin modplug_plugin;
 extern const struct decoder_plugin mikmod_decoder_plugin;
@@ -65,7 +65,7 @@ static const struct decoder_plugin *const decoder_plugins[] = {
 	&mp4ff_decoder_plugin,
 #endif
 #ifdef HAVE_MPCDEC
-	&mpcPlugin,
+	&mpcdec_decoder_plugin,
 #endif
 #ifdef HAVE_WAVPACK
 	&wavpack_plugin,