trace2: use system/global config for default trace2 settings

diff --git a/environment.c b/environment.c
index 0e37741d838256d196b2ec9f3ca4e54395c66d31..89af47cb8504903b90460d5faa91be9f61bd2fc3 100644 (file)
--- a/environment.c
+++ b/environment.c
@@ -107,7 +107,7 @@ char *git_work_tree_cfg;
 
 static char *git_namespace;
 
-static const char *super_prefix;
+static char *super_prefix;
 
 /*
  * Repository-local GIT_* environment variables; see cache.h for details.
@@ -240,7 +240,7 @@ const char *get_super_prefix(void)
 {
        static int initialized;
        if (!initialized) {
-               super_prefix = getenv(GIT_SUPER_PREFIX_ENVIRONMENT);
+               super_prefix = xstrdup_or_null(getenv(GIT_SUPER_PREFIX_ENVIRONMENT));
                initialized = 1;
        }
        return super_prefix;