Author: Niko Tyni <ntyni@debian.org>
Description: add a missing return value at the end of a non-void function.
 The arp_lookup_linux function currently returns -1 when an error occurs, but
 do nothing when it succeeds.
 This makes the function returns 0 rather than no value.

--- libnet-arp-perl.orig/arp_lookup_linux.c
+++ libnet-arp-perl/arp_lookup_linux.c
@@ -67,4 +67,5 @@
     }
 
     fclose(fp);
+    return 0;
 }