master 2a2b3f5834: Fix some cases of flicker on MS Windows

[Po Lu]

branch: master
commit 2a2b3f583430df8495b566a1dfb1f41c4d61292f
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Fix some cases of flicker on MS Windows
    
    * src/w32term.c (w32_read_socket): Fix typo in check before
    flipping buffers.
---
 src/w32term.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/w32term.c b/src/w32term.c
index 11675085fc..19786da3a6 100644
--- a/src/w32term.c
+++ b/src/w32term.c
@@ -5976,7 +5976,7 @@ w32_read_socket (struct terminal *terminal,
 
       if (f && !w32_disable_double_buffering
          && FRAME_OUTPUT_DATA (f)->paint_buffer_dirty
-         && !f->garbaged && ignore_dirty_back_buffer)
+         && !f->garbaged && !ignore_dirty_back_buffer)
        w32_show_back_buffer (f);
     }