[An extra null pointer check is not needed in functions](https://stackoverflow.com/questions/18775608/free-a-null-pointer-anyway-or-check-first "Free a null pointer anyway or check first?") like the following. - [ComplexFunction](https://github.com/mintsuki/fvwm95/blob/93534427893b2e6f93c2612c8e9d82ec82cb07aa/fvwm/complex.c#L92) - [GetConfigLine](https://github.com/mintsuki/fvwm95/blob/93534427893b2e6f93c2612c8e9d82ec82cb07aa/libs/GetLine.c#L21)
