The new committed files add some warning from the static analyser
'sparse':
- Don't assign pointer to 0, use NULL.
- switch with no cases.
Fix them.
Change-Id: I2c02d629bd80b71c8e42553be5d9388bb9b6bcd0
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7668
Tested-by: jenkins