Commit c9ccc99f7 for imagemagick.org

commit c9ccc99f71fe68bf946ef45f00947e6f33ceea2d
Author: Dirk Lemstra <dirk@lemstra.org>
Date:   Sat Apr 18 00:31:25 2026 +0200

    Fix missing volatile on quantum_info in WriteOnePNGImage

diff --git a/coders/png.c b/coders/png.c
index daf414322..72eed711a 100644
--- a/coders/png.c
+++ b/coders/png.c
@@ -8053,7 +8053,7 @@ static MagickBooleanType WriteOnePNGImage(MngWriteInfo *mng_info,
     *volatile pixel_info;

   QuantumInfo
-    *quantum_info;
+    *volatile quantum_info;

   PNGErrorInfo
     error_info;