[gtk/wip.win32.fixes: 42/42] GTK: Fix builds against latest stable GLib with MSVC

[Chun-wei Fan <fanchunwei src gnome org>]

commit 495e1648c8f5116191e17f6328df356d79a75328
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Fri Apr 16 11:36:18 2021 +0800

    GTK: Fix builds against latest stable GLib with MSVC
    
    GLib-2.68.x now considers warning C4098 ('void' function returning a value) as
    an error, so avoid doing that.

 gtk/gtkcssimagepaintable.c | 6 +++---
 gtk/gtknative.c            | 4 ++--
 gtk/gtkshortcutaction.c    | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/gtk/gtkcssimagepaintable.c b/gtk/gtkcssimagepaintable.c
index d4056ab263..d45955c5df 100644
--- a/gtk/gtkcssimagepaintable.c
+++ b/gtk/gtkcssimagepaintable.c
@@ -66,9 +66,9 @@ gtk_css_image_paintable_snapshot (GtkCssImage *image,
 {
   GtkCssImagePaintable *paintable = GTK_CSS_IMAGE_PAINTABLE (image);
 
-  return gdk_paintable_snapshot (get_paintable (paintable),
-                                 snapshot,
-                                 width, height);
+  gdk_paintable_snapshot (get_paintable (paintable),
+                          snapshot,
+                          width, height);
 }
 
 static GtkCssImage *
diff --git a/gtk/gtknative.c b/gtk/gtknative.c
index 546b088a43..7856d4f486 100644
--- a/gtk/gtknative.c
+++ b/gtk/gtknative.c
@@ -102,7 +102,7 @@ gtk_native_layout (GtkNative *self,
                    int        width,
                    int        height)
 {
-  return GTK_NATIVE_GET_IFACE (self)->layout (self, width, height);
+  GTK_NATIVE_GET_IFACE (self)->layout (self, width, height);
 }
 
 static void
@@ -258,7 +258,7 @@ gtk_native_get_surface_transform (GtkNative *self,
   g_return_if_fail (x != NULL);
   g_return_if_fail (y != NULL);
 
-  return GTK_NATIVE_GET_IFACE (self)->get_surface_transform (self, x, y);
+  GTK_NATIVE_GET_IFACE (self)->get_surface_transform (self, x, y);
 }
 
 /**
diff --git a/gtk/gtkshortcutaction.c b/gtk/gtkshortcutaction.c
index 7870b0465c..62d213911d 100644
--- a/gtk/gtkshortcutaction.c
+++ b/gtk/gtkshortcutaction.c
@@ -132,7 +132,7 @@ gtk_shortcut_action_print (GtkShortcutAction *self,
   g_return_if_fail (GTK_IS_SHORTCUT_ACTION (self));
   g_return_if_fail (string != NULL);
 
-  return GTK_SHORTCUT_ACTION_GET_CLASS (self)->print (self, string);
+  GTK_SHORTCUT_ACTION_GET_CLASS (self)->print (self, string);
 }
 
 /**