squash -Wunused-parameter warnings in dummy bindings init

diff --git a/tclpkg/gv/gv_dummy_init.c b/tclpkg/gv/gv_dummy_init.c
index d213ab86d5c6ec3997f40b3b16ae3962deaf3f60..451eac6bb969e83def280f95488a136313f375bf 100644 (file)
--- a/tclpkg/gv/gv_dummy_init.c
+++ b/tclpkg/gv/gv_dummy_init.c
@@ -1,5 +1,5 @@
 #include <gvc/gvc.h>
 
-void gv_string_writer_init (GVC_t *gvc) {}
-void gv_channel_writer_init (GVC_t *gvc) {}
-void gv_writer_reset (GVC_t *gvc) {}
+void gv_string_writer_init (GVC_t *gvc) { (void)gvc; }
+void gv_channel_writer_init (GVC_t *gvc) { (void)gvc; }
+void gv_writer_reset (GVC_t *gvc) { (void)gvc; }