Fix detection of screen size GTK

A gdk call that can get the screen without there first being a window
mapped to it is used now. This fixes initial sizing of the board window
on a cold start.

diff --git a/gtk/xboard.c b/gtk/xboard.c
index 40e41c8..ef1daa2 100644 (file)
--- a/gtk/xboard.c
+++ b/gtk/xboard.c
@@ -1028,7 +1028,8 @@ main (int argc, char **argv)
     } else {
         SizeDefaults *szd = sizeDefaults;
         if (*appData.boardSize == NULLCHAR) {
-            GdkScreen *screen = gtk_window_get_screen(GTK_WINDOW(mainwindow)); // TODO: this does not work, as no mainwindow yet
+//            GdkScreen *screen = gtk_window_get_screen(GTK_WINDOW(mainwindow)); // TODO: this does not work, as no mainwindow yet
+            GdkScreen *screen = gdk_screen_get_default();
             guint screenwidth = gdk_screen_get_width(screen);
             guint screenheight = gdk_screen_get_height(screen);
            while (screenwidth  < (szd->minScreenSize*BOARD_WIDTH  + 4)/8 ||