send-email: Cleanup smtp-domain and add config

diff --git a/color.c b/color.c
index 62977f4808ae339fdfe797e16b4eb28dc6abb85d..8f07fc9547efdf37cf44ab0b880f6c26970b3e95 100644 (file)
--- a/color.c
+++ b/color.c
@@ -138,6 +138,9 @@ int git_config_colorbool(const char *var, const char *value, int stdout_is_tty)
                        goto auto_color;
        }
 
+       if (!var)
+               return -1;
+
        /* Missing or explicit false to turn off colorization */
        if (!git_config_bool(var, value))
                return 0;