Fix a potential segfault in sp_get_config_*().

diff --git a/serialport.c b/serialport.c
index 80527be098a85eed8d624ce7ff8dd4e5dc594e12..f2d2edcd3b56349feb85e4116defe25f64201ceb 100644 (file)
--- a/serialport.c
+++ b/serialport.c
@@ -2117,6 +2117,8 @@ SP_API enum sp_return sp_set_##x(struct sp_port *port, type x) { \
 SP_API enum sp_return sp_get_config_##x(const struct sp_port_config *config, \
                                         type *x) { \
        TRACE("%p, %p", config, x); \
+       if (!x) \
+               RETURN_ERROR(SP_ERR_ARG, "Null result pointer"); \
        if (!config) \
                RETURN_ERROR(SP_ERR_ARG, "Null config"); \
        *x = config->x; \