When compiling with compiler that defaults to C99 (on OSX) there is a single warning on implicit declaration of sigv_restore_tab

The following patch should fix this
diff --git a/src/direvent.h b/src/direvent.h
index 07dfd0b..c907e7e 100644
--- a/src/direvent.h
+++ b/src/direvent.h
@@ -241,6 +241,7 @@ int sigv_set_all(void (handler)(int), int sigc, int sigv,
struct sigaction *retsa);
int sigv_set_tab(int sigc, struct sigtab sigtab, struct sigaction retsa);
int sigv_set_action_tab(int sigc, struct sigtab sigtab, struct sigaction sa);
+int sigv_restore_tab(int sigc, struct sigtab sigtab, struct sigaction sa);
^L
void filename_pattern_free(void *p);
int filename_pattern_match(struct grecs_list lp, const char name);