Description: Fix ftbfs with GCC-10

Author: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Bug-Debian: https://bugs.debian.org/957200
Forwarded: no

---

--- fdutils-5.5-20060227.orig/src/superformat.h
+++ fdutils-5.5-20060227/src/superformat.h
@@ -97,7 +97,7 @@ int compute_all_sequences(struct params
 void compute_track0_sequence(struct params *fd);
 int calc_skews(struct params *fd0, struct params *fd, int n);
 extern int verbosity;
-int header_size;
-int index_size;
+extern int header_size;
+extern int index_size;
 
 #endif