0p not working at global scope

[pabuhr]

Using 0p at global scope fails but works at local scope. 0 works at global scope.

void * realloc( void * ptr, size_t size ) { printf( "fred\n" ); } // C realloc

forall( dtype T | sized(T) )
T * realloc( T * ptr, size_t size ) {
    return (T *)(void *)realloc( (void *)ptr, size ); // call C realloc
}
// realloc with 0 pointer => malloc
void * r = realloc( 0p, 4 ); // works with 0, fails with 0p
int main() {
    void * r = realloc( 0p, 4 ); // works
}

CFA Version 1.0.0 (debug)
test.cfa: In function '__global_init__':
test.cfa:8:83: error: '_sizeof_Y9_75_51_DT' undeclared (first use in this function)
    8 | void * r = realloc( 0p, 4 ); // works with 0, fails with 0p
      |                                                                                   ^                  
test.cfa:8:83: note: each undeclared identifier is reported only once for each function it appears in
test.cfa:8:104: error: '_alignof_Y9_75_51_DT' undeclared (first use in this function)
    8 | void * r = realloc( 0p, 4 ); // works with 0, fails with 0p
      |                                                                                                        ^                   

[ajbeach]

Appears to be the same as #160.