[mousetweaks] Fix compiler warning

[Gerd Kohlberger <gerdk src gnome org>]

commit 8ea2e6b0d94af1aae3c96033ec4d4ecd6eeda4ab
Author: Gerd Kohlberger <gerdk src gnome org>
Date:   Wed Mar 9 18:36:16 2011 +0100

    Fix compiler warning

 src/mt-sig-handler.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/mt-sig-handler.c b/src/mt-sig-handler.c
index 0528e9b..574127d 100644
--- a/src/mt-sig-handler.c
+++ b/src/mt-sig-handler.c
@@ -89,7 +89,7 @@ static void
 signal_handler (int signal_id)
 {
     unsigned char sid;
-    int whtevr;
+    int G_GNUC_UNUSED whtevr;
 
     sid = (unsigned char) signal_id;
     whtevr = write (_write_fd, &sid, 1);