test-lib: unset GIT_TRACE

diff --git a/describe.c b/describe.c
index aa3434a4cbfe62563b7621ddd7e72be3adbea1cc..8e68d5df3303ed75c2fbb9c8b3d1025785a622c7 100644 (file)
--- a/describe.c
+++ b/describe.c
@@ -97,7 +97,7 @@ static int compare_names(const void *_a, const void *_b)
        return (a_date > b_date) ? -1 : (a_date == b_date) ? 0 : 1;
 }
 
-static void describe(char *arg, int last_one)
+static void describe(const char *arg, int last_one)
 {
        unsigned char sha1[20];
        struct commit *cmit;