Fix crash in last commit.

src/cache.c

@@ -1404,6 +1404,7 @@ int cache_make_stat(struct txt_record *t)
 static char *sanitise(char *name)
 {
   unsigned char *r;
+  if (name)
     for (r = (unsigned char *)name; *r; r++)
       if (!isprint((int)*r))
 	return "<name unprintable>";