}
void whlp_backend(paragraph *sourceform, keywordlist *keywords,
- indexdata *idx) {
+ indexdata *idx, void *unused) {
WHLP h;
char *filename, *cntname;
paragraph *p, *lastsect;
indexentry *ie;
int done_contents_topic = FALSE;
+ IGNORE(unused);
+
h = state.h = whlp_new();
state.keywords = keywords;
state.idx = idx;