menu: Ignore empty INTERFACE_HELP_COLOUR config value
diff --git a/common/menu.c b/common/menu.c
index 1e17fe2e..0411c559 100644
--- a/common/menu.c
+++ b/common/menu.c
@@ -847,7 +847,7 @@ noreturn void _menu(bool first_run) {
if (interface_help_colour_str == NULL) {
interface_help_colour_str = config_get_value(NULL, 0, "INTERFACE_HELP_COLOR");
}
- if (interface_help_colour_str != NULL) {
+ if (interface_help_colour_str != NULL && interface_help_colour_str[0] != '\0') {
interface_help_colour[3] = interface_help_colour_str[0];
interface_help_colour_bright[3] = interface_help_colour_str[0];
}
