From 5568067a3d151caf17d01de9192ca4471decba97 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Tue, 19 Jul 2011 22:36:00 +0000
Subject: [PATCH] Fix harmless gcc warning about uninitialized mask in PNG
 saving code.

The mask was actually only used when it was initialized (or, conversely, the
mask was always initialized when it was used) but gcc doesn't seem to notice
this and still warns that mask components "may be used uninitialized in this
function".

Suppress the warnings by always initializing the mask, even if we don't use
it.

Closes #13333.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@68309 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/common/imagpng.cpp | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/common/imagpng.cpp b/src/common/imagpng.cpp
index 578d0baf6d..284f5d7171 100644
--- a/src/common/imagpng.cpp
+++ b/src/common/imagpng.cpp
@@ -795,15 +795,13 @@ bool wxPNGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbos
 #endif
     ;
 
-    png_color_8 mask;
+    png_color_8 mask = { 0, 0, 0, 0, 0 };
 
     if (bHasMask)
     {
         mask.red   = image->GetMaskRed();
         mask.green = image->GetMaskGreen();
         mask.blue  = image->GetMaskBlue();
-        mask.alpha = 0;
-        mask.gray  = 0;
     }
 
     PaletteMap palette;
-- 
2.45.2