Expression which evaluates to zero treated as a null pointer constant of type

"Expression which evaluates to zero treated as a null pointer constant of type" build failure(s)
clang 6.0

Versions: 2.9 - 3.0 - 3.1 - 3.2 - 3.3 - 3.4 - 3.4.2 - 3.5.0 - 3.6.0 - 3.8.1 - 3.9.1 - 4.0.1 - 5.0 - 6.0 - 8.0.1 - 9.0.1 - 10.0.0 - 11.0.0 - 12.0.1 - 13.0.0

Package	Version	Supposed error message	Full log	Bug report
mxt-app	1.27-2	src/test/run_unit_tests.c:41:5: error: expression which evaluates to zero treated as a null pointer constant of type 'CMFixtureFunction' (aka 'int ()(void *)') [-Werror,-Wnon-literal-null-conversion]	Log
snoopy	2.4.6-3	domain.c:119:23: error: expression which evaluates to zero treated as a null pointer constant of type 'char *' [-Werror,-Wnon-literal-null-conversion]	Log

2 errors

Debian Package rebuild