[elpa] externals/pyim 3bd46fb2c2 1/2: check pyim-preview-overlay in pyim-preview-delete-string

[ELPA Syncer]

branch: externals/pyim
commit 3bd46fb2c2ffedfe0a7e2d0fc2ff36f7a553e7a7
Author: Chen Bin <chenbin.sh@gmail.com>
Commit: Chen Bin <chenbin.sh@gmail.com>

    check pyim-preview-overlay in  pyim-preview-delete-string
---
 pyim-preview.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyim-preview.el b/pyim-preview.el
index 823198747a..24fe56d469 100644
--- a/pyim-preview.el
+++ b/pyim-preview.el
@@ -104,7 +104,7 @@ pyim 会使用 Emacs overlay 机制在 *待输入buffer* 光标处高亮显示
 
 (defun pyim-preview-delete-string ()
   "删除已经插入 buffer 的 preview 预览字符串。"
-  (when (overlay-start pyim-preview-overlay)
+  (when (and pyim-preview-overlay (overlay-start pyim-preview-overlay))
     (delete-region (overlay-start pyim-preview-overlay)
                    (overlay-end pyim-preview-overlay))))