[PATCH powerdebug] Check null pointer before dereferencing

Fixes the below issue: - check if pointer t is null before de-referencing

diff --git a/gpio.c b/gpio.c index 39480b0..5db17e7 100644 --- a/gpio.c +++ b/gpio.c @@ -273,9 +273,11 @@ static int gpio_display(bool refresh) static int gpio_change(int keyvalue) { struct tree *t = display_get_row_data(GPIO); - struct gpio_info *gpio = t->private; + if (!t) + return -1;

- if (!t || !gpio) + struct gpio_info *gpio = t->private; + if (!gpio) return -1;

switch (keyvalue) {