buffer_seek did not work at all m(

buffer/buffer_seek.c

@@ -27,7 +27,10 @@ ssize_t buffer_seek(buffer* b,size_t len) {
       ssize_t r = buffer_feed(b);
       if (r < 0) return -1;
       if (r == 0) break;
-      if ((size_t)r > len) r = len;	// can't happen
+      if ((size_t)r > len) {	// awesome, we are done
+	b->p = len;
+	return r;
+      }
       len -= r;
       b->p = b->n = 0;
     }