weston-launch: Only pass non-NULL value into setenv()

getenv() can return NULL is the key is not set, passing NULL into
setenv() is an error

diff --git a/src/weston-launch.c b/src/weston-launch.c
index 5b03094..7264f7e 100644 (file)
--- a/src/weston-launch.c
+++ b/src/weston-launch.c
@@ -515,7 +515,8 @@ setup_session(struct weston_launch *wl)
 
        term = getenv("TERM");
        clearenv();
-       setenv("TERM", term, 1);
+       if (term)
+               setenv("TERM", term, 1);
        setenv("USER", wl->pw->pw_name, 1);
        setenv("LOGNAME", wl->pw->pw_name, 1);
        setenv("HOME", wl->pw->pw_dir, 1);