Bug 540298 - [regression] NPE in Widget.filters

Reverting main change from commit
02a7362 due the various regressions
caused by using gtk_widget_hide() call inside Control.gtk_draw() (see
bug 540298 comment 24).

Change-Id: I7408f5700ba9ed6c0282ba2b7c2f174227f12cf2
Signed-off-by: Andrey Loskutov <[email protected]>

Author: iloveeclipse

bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Control.java

@@ -3449,15 +3449,6 @@ void cairoClipRegion (long /*int*/ cairo) {
 	if ((state & OBSCURED) != 0) return 0;
 	GdkRectangle rect = new GdkRectangle ();
 	GDK.gdk_cairo_get_clip_rectangle (cairo, rect);
-	/*
-	 * On GTK3.19+, widget are are shown with the default minimum size regardless of the
-	 * size of the fixed container. This causes 0x0 widgets to be visible but cannot be used.
-	 * The fix is to make the widget invisible to the user. Resizing widget later on to a larger size
-	 * makes the widget visible again in setBounds. See Bug 533469, Bug 531120.
-	 */
-	if (GTK.GTK_VERSION > OS.VERSION (3, 18, 0) && (state & ZERO_WIDTH) != 0 && (state & ZERO_HEIGHT) != 0) {
-		if (GTK.gtk_widget_get_visible(widget)) GTK.gtk_widget_hide(widget);
-	}
 	/*
 	 * Modify the drawing of the widget with cairo_clip.
 	 * Doesn't modify input handling at this time.