- (wl-message-buffer-prefetch-next folder num
- wl-message-buffer-prefetch-depth
- (current-buffer)
- wl-summary-buffer-mime-charset)
+ (wl-message-buffer-prefetch-next
+ folder num
+ (min wl-message-buffer-prefetch-depth
+ (1- wl-message-buffer-cache-size))
+ (current-buffer)
+ wl-summary-buffer-mime-charset)