Add a configure option for default window size

config.def.h

@@ -42,6 +42,9 @@ static UriParameters uriparams[] = {
 	}, },
 };
 
+/* default window size: width, height */
+static int winsize[] = { 800, 600 };
+
 static WebKitFindOptions findopts = WEBKIT_FIND_OPTIONS_CASE_INSENSITIVE |
                                     WEBKIT_FIND_OPTIONS_WRAP_AROUND;
 

surf.c

@@ -1200,7 +1200,7 @@ createwindow(Client *c)
 		gtk_window_set_role(GTK_WINDOW(w), wmstr);
 		g_free(wmstr);
 
-		gtk_window_set_default_size(GTK_WINDOW(w), 800, 600);
+		gtk_window_set_default_size(GTK_WINDOW(w), winsize[0], winsize[1]);
 	}
 
 	g_signal_connect(G_OBJECT(w), "destroy",