master 79b50d0f90: Avoid extra sync if we didn't get the right wmstate

[Po Lu]

branch: master
commit 79b50d0f90707f28d8ce7d83e03c54c3572af782
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Avoid extra sync if we didn't get the right wmstate
    
    * src/xterm.c (x_dnd_get_wm_state_and_proto): Always set proto
    version.
    (x_dnd_get_target_window): Optimize accordingly.
---
 src/xterm.c | 25 ++++++++-----------------
 1 file changed, 8 insertions(+), 17 deletions(-)

diff --git a/src/xterm.c b/src/xterm.c
index 3c71ddf395..aec78dece5 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -2164,10 +2164,9 @@ x_dnd_get_wm_state_and_proto (struct x_display_info 
*dpyinfo,
   x_uncatch_errors ();
 
   if (rc)
-    {
-      *wmstate_out = *(unsigned long *) data;
-      *proto_out = x_dnd_get_window_proto (dpyinfo, window);
-    }
+    *wmstate_out = *(unsigned long *) data;
+
+  *proto_out = x_dnd_get_window_proto (dpyinfo, window);
 
   if (data)
     XFree (data);
@@ -2210,6 +2209,7 @@ x_dnd_get_wm_state_and_proto (struct x_display_info 
*dpyinfo,
   reply = xcb_get_property_reply (dpyinfo->xcb_connection,
                                  xdnd_proto_cookie, &error);
 
+  *proto_out = -1;
   if (!reply)
     free (error);
   else
@@ -2217,8 +2217,6 @@ x_dnd_get_wm_state_and_proto (struct x_display_info 
*dpyinfo,
       if (reply->format == 32
          && xcb_get_property_value_length (reply) >= 4)
        *proto_out = *(uint32_t *) xcb_get_property_value (reply);
-      else
-       *proto_out = -1;
 
       free (reply);
     }
@@ -2359,17 +2357,10 @@ x_dnd_get_target_window (struct x_display_info *dpyinfo,
       if (child_return)
        {
          if (x_dnd_get_wm_state_and_proto (dpyinfo, child_return,
-                                           &wmstate, &proto))
-           {
-             *proto_out = proto;
-             x_uncatch_errors ();
-
-             return child_return;
-           }
-
-         proto = x_dnd_get_window_proto (dpyinfo, child_return);
-
-         if (proto != -1)
+                                           &wmstate, &proto)
+             /* Proto is set by x_dnd_get_wm_state even if getting
+                the wm state failed.  */
+             || proto != -1)
            {
              *proto_out = proto;
              x_uncatch_errors ();