eliminate warning about unused variable that occurs in some cases

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@37298 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/codecs/gsm/src/preprocess.c b/codecs/gsm/src/preprocess.c
index fe63d678aa29b67d14e60fc2ac811cbfea5af655..eacdac85137eaaf3844df8bb845791d85b7fd1bb 100644 (file)
--- a/codecs/gsm/src/preprocess.c
+++ b/codecs/gsm/src/preprocess.c
@@ -44,6 +44,8 @@ void Gsm_Preprocess P3((S, s, so),
        ulongword       utmp;           /* for L_ADD */
        register int    k = 160;
 
+       (void) utmp;
+
        while (k--) {
 
        /*  4.2.1   Downscaling of the input signal