usage: add set_warn_routine()

diff --git a/usage.c b/usage.c
index 1dad03fb5c9b7f8f7785915d004aff43e39b0d2a..67e552689961df3bd7dd65a7cb3587d3cf173867 100644 (file)
--- a/usage.c
+++ b/usage.c
@@ -70,6 +70,11 @@ void set_error_routine(void (*routine)(const char *err, va_list params))
        error_routine = routine;
 }
 
+void set_warn_routine(void (*routine)(const char *warn, va_list params))
+{
+       warn_routine = routine;
+}
+
 void set_die_is_recursing_routine(int (*routine)(void))
 {
        die_is_recursing = routine;