[gtk/wip/chergert/quartz4u: 118/142] macos: simplify conditional

[Christian Hergert <chergert src gnome org>]

commit 001b1d5eeba736b69f26cfe529a46b2be0d2d9d8
Author: Christian Hergert <chergert redhat com>
Date:   Thu Jun 4 14:24:13 2020 -0700

    macos: simplify conditional

 gdk/macos/gdkmacossurface.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)
---
diff --git a/gdk/macos/gdkmacossurface.c b/gdk/macos/gdkmacossurface.c
index 221390ae2b..f19f8ed1e7 100644
--- a/gdk/macos/gdkmacossurface.c
+++ b/gdk/macos/gdkmacossurface.c
@@ -98,11 +98,9 @@ gdk_macos_surface_set_opaque_region (GdkSurface     *surface,
 
   g_assert (GDK_IS_MACOS_SURFACE (surface));
 
-  if (!(nsview = _gdk_macos_surface_get_view (GDK_MACOS_SURFACE (surface))) ||
-      !GDK_IS_MACOS_CAIRO_VIEW (nsview))
-    return;
-
-  [(GdkMacosCairoView *)nsview setOpaqueRegion:region];
+  if ((nsview = _gdk_macos_surface_get_view (GDK_MACOS_SURFACE (surface))) &&
+      GDK_IS_MACOS_CAIRO_VIEW (nsview))
+    [(GdkMacosCairoView *)nsview setOpaqueRegion:region];
 }
 
 static void