`gvim.exe --serverlist`や`gvim.exe --remote-expr "1+1"`などで表示されるダイアログ

avoid_errer_dialog.patch

diff --git a/src/main.c b/src/main.c
index 268c256..a7f104a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -3934,6 +3934,9 @@ cmdsrv_main(
 		mainerr_arg_missing((char_u *)argv[i]);
 # ifdef WIN32
 	    /* Win32 always works? */
+# ifdef FEAT_GUI_W32
+	    gui.starting = TRUE;
+# endif
 	    if (serverSendToVim(sname, (char_u *)argv[i + 1],
 						  &res, NULL, 1, 0, FALSE) < 0)
 # else
@@ -3943,6 +3946,9 @@ cmdsrv_main(
 					       &res, NULL, 1, 0, 1, FALSE) < 0)
 # endif
 	    {
+# ifdef FEAT_GUI_W32
+		gui.starting = FALSE;
+# endif
 		if (res != NULL && *res != NUL)
 		{
 		    /* Output error from remote */
@@ -3957,6 +3963,9 @@ cmdsrv_main(
 	{
 # ifdef WIN32
 	    /* Win32 always works? */
+# ifdef FEAT_GUI_W32
+	    gui.starting = TRUE;
+# endif
 	    res = serverGetVimNames();
 # else
 	    if (xterm_dpy != NULL)