* error-checking malloc et al.
*/
void vtfree(void *);
-void* vtmalloc(int);
-void* vtmallocz(int);
-void* vtrealloc(void *p, int);
-void* vtbrk(int n);
+void* vtmalloc(ulong);
+void* vtmallocz(ulong);
+void* vtrealloc(void *p, ulong);
+void* vtbrk(ulong);
char* vtstrdup(char *);
/*