send-email: lazy-load Email::Valid and make it optional

diff --git a/diffcore.h b/diffcore.h
index 12cd816591aa112b5fe6a773cb5ba2acbf9cf96e..dba4f17658e6b3b7e1853ca024f8cfe9eae9c92e 100644 (file)
--- a/diffcore.h
+++ b/diffcore.h
@@ -101,4 +101,10 @@ void diff_debug_queue(const char *, struct diff_queue_struct *);
 #define diff_debug_queue(a,b) do {} while(0)
 #endif
 
+extern int diffcore_count_changes(void *src, unsigned long src_size,
+                                 void *dst, unsigned long dst_size,
+                                 unsigned long delta_limit,
+                                 unsigned long *src_copied,
+                                 unsigned long *literal_added);
+
 #endif