Bump patch version for release

libheif retains the heif_reader pointer after
heif_context_read_from_reader returns. The callback table was scoped
to the non-sequential branch and could be destroyed before
tiled image decoding used it from worker threads.

Give the callback table static storage duration.

BUG: 523105
(cherry picked from commit ad0fb9dde4)

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.29)
 
-set(KF_VERSION "6.28.0") # handled by release scripts
+set(KF_VERSION "6.28.1") # handled by release scripts
 set(KF_DEP_VERSION "6.28.0") # handled by release scripts
 project(KImageFormats VERSION ${KF_VERSION})
 

src/imageformats/heif.cpp

@@ -711,7 +711,8 @@ bool HEIFHandler::ensureDecoder()
         buffer = deviceRead(dev, kMaxQVectorSize);
         err = heif_context_read_from_memory(ctx, static_cast<const void *>(buffer.constData()), buffer.size(), nullptr);
     } else {
-        heif_reader reader = create_heif_reader_for_qiodevice();
+        // Must not be destroyed until decoding ends
+        static const heif_reader reader = create_heif_reader_for_qiodevice();
         err = heif_context_read_from_reader(ctx, &reader, dev, nullptr);
     }
     if (err.code) {