Fix compile errors when compiling w/o zlib

Change-Id: I443cd0d4a143e456e11b5939891312a0501770a0
Reviewed-on: https://code.wireshark.org/review/14636
Reviewed-by: Jaap Keuter <jaap.keuter@xs4all.nl>
Petri-Dish: Jaap Keuter <jaap.keuter@xs4all.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/captype.c b/captype.c
index 02094b4615..8b75852992 100644
--- a/captype.c
+++ b/captype.c
@@ -104,7 +104,7 @@ get_captype_compiled_info(GString *str)
 }
 
 static void
-get_captype_runtime_info(GString *str)
+get_captype_runtime_info(GString *str _U_)
 {
   /* zlib */
 #if defined(HAVE_LIBZ) && !defined(_WIN32)