Don't compare pointers with 0, use NULL when needed.
Don't assign pointer to 0, use NULL.
Don't pass 0 ad pointer argument, pass NULL.
While there, check for return value from malloc(), replace an
assert() with a LOG_ERROR(), drop a useless cast.
Detected through 'sparse' tool.
Change-Id: Ia7cf52221b12198aba1a07ebdfaf57ce341d5699
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7592
Tested-by: jenkins
07e1ebcc12