Don't assign pointer to 0, use NULL. Don't pass 0 ad pointer argument, pass NULL. Detected through 'sparse' tool. Change-Id: I806031d2ae505fa5f0accc6be1936d48cd365ca4 Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com> Reviewed-on: https://review.openocd.org/c/openocd/+/7604 Tested-by: jenkins