Add const to char * to quiet warnings.

Note two warnings in comments.  The serious one is that struct
interface->ifindex probably needs to be signed, ssince we store and
compare to -1.
diff --git a/zebra/ChangeLog b/zebra/ChangeLog
index 696676b..8d09f50 100644
--- a/zebra/ChangeLog
+++ b/zebra/ChangeLog
@@ -1,3 +1,7 @@
+2004-12-09  Greg Troxel  <gdt@fnord.ir.bbn.com>
+
+	* kernel_socket.c (rtmsg_debug): char * => const char *
+
 2004-12-07 Andrew J. Schorr <ajschorr@alumni.princeton.edu>
 
 	* *.c: Change level of debug messages to LOG_DEBUG.