add: nptr = wmalloc(newsize);
context: void *wrealloc(void *ptr, size_t newsize){    void *nptr;    if (!ptr) {#ifdef TEST_WITH_GC	nptr = GC_malloc(newsize);#else	nptr = malloc(newsize);#endif    } else {#ifdef TEST_WITH_GC	nptr = GC_realloc(ptr, newsize);#else	nptr=realloc(ptr, newsize);#endif    }    if (nptr==NULL) {	printf("Could not do realloc");	return NULL;    }    return nptr;}