scripts/coccinelle: add some more coccinelle tests

kmerr: verify that malloc and calloc are followed by a check to verify
that we are not out of memory.

badzero: Compare pointer-typed values to NUL

scripts/coccinelle: add some more coccinelle tests

kmerr: verify that malloc and calloc are followed by a check to verify
that we are not out of memory.

badzero: Compare pointer-typed values to NULL rather than 0

Both checks are copied from the Linux kernel archive.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

show more ...