Add fix_empty_font_ids() to replace empty Font ids with a dummy string.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/util.h b/src/util.h
index b2bddd5a..2626162a 100644
--- a/src/util.h
+++ b/src/util.h
@@ -78,6 +78,7 @@ extern std::string spaces (int n);
 extern void indent (xmlpp::Element* element, int initial);
 extern bool day_less_than_or_equal (struct tm a, LocalTime b);
 extern bool day_greater_than_or_equal (struct tm a, LocalTime b);
+extern std::string unique_string (std::list<std::string> existing, std::string base);
 
 }