filter.c: Add documentation of stat_item_values[].

diff --git a/filter.c b/filter.c
index 79574db14c2299af0dda1b40bbf8215d2a3f1ae7..768a99fbf9bb1708a796ec26c7aab73476bd2ea6 100644 (file)
--- a/filter.c
+++ b/filter.c
@@ -24,6 +24,12 @@
 /** The list of all status items used by para_{server,audiod,gui}. */
 const char *status_item_list[] = {STATUS_ITEM_ARRAY};
 
+/**
+ * Dummy version which only contains NULL pointers.
+ *
+ * This is used by the amp filter which first tries to obtain the amplification
+ * value from an element in this array.
+ */
 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
 
 /** Initialize the array of errors for para_filter. */