Add fix_empty_font_ids() to replace empty Font ids with a dummy string.v1.6.14

Back-ported from abf4f7577877254ecd7a1dc7955e0d7ca49ad07c in master.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/util.h b/src/util.h
index bc109c62..0bb36cb0 100644
--- a/src/util.h
+++ b/src/util.h
@@ -75,6 +75,7 @@ extern xmlpp::Node* find_child (xmlpp::Node const * node, std::string name);
 extern std::string openjpeg_version();
 extern std::string spaces (int n);
 extern void indent (xmlpp::Element* element, int initial);
+extern std::string unique_string (std::list<std::string> existing, std::string base);
 
 }