Only expose pcmbuf_beep on SWCODEC targets (aka fix red).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23406 a1c6a512-1295-4272-9138-f99709370657

apps/plugin.c

@@ -672,7 +672,9 @@ static const struct plugin_api rockbox_api = {
     appsversion,
     /* new stuff at the end, sort into place next time
        the API gets incompatible */
+#if (CONFIG_CODEC == SWCODEC)
     pcmbuf_beep,
+#endif
 };
 
 int plugin_load(const char* plugin, const void* parameter)

apps/plugin.h

@@ -842,9 +842,11 @@ struct plugin_api {
     /* new stuff at the end, sort into place next time
        the API gets incompatible */
 
+#if (CONFIG_CODEC == SWCODEC)
     void (*pcmbuf_beep)(unsigned int frequency,
                         size_t duration,
                         int amplitude);
+#endif
 };
 
 /* plugin header */