[Monetdb-developers] Signed/unsigned and NULL

I just figured that the following yields in a signed/unsigned warning: 1 void myfunc(char *s) { 2 if (s != NULL) { 3 ... 4 } 5 } The error occurs on line 2. I cannot find the definition of NULL, but I suspect it is defined like: #define NULL 0 Obviously 0 is signed while s (pointer) is not. Maybe we should use #define NULL (char*)0 instead?