Commit 4e0a7181 for libheif

commit 4e0a7181476bf2003029a5a482dc25572a919300
Author: Dirk Farin <dirk.farin@gmail.com>
Date:   Fri Dec 26 00:17:33 2025 +0100

    fix integer types when reading grid header

diff --git a/libheif/image-items/grid.cc b/libheif/image-items/grid.cc
index 41a14cc9..3bda1d52 100644
--- a/libheif/image-items/grid.cc
+++ b/libheif/image-items/grid.cc
@@ -60,22 +60,22 @@ Error ImageGrid::parse(const std::vector<uint8_t>& data)
               "Grid image data incomplete"};
     }

-    m_output_width = ((data[4] << 24) |
-                      (data[5] << 16) |
-                      (data[6] << 8) |
-                      (data[7]));
+    m_output_width = ((static_cast<uint32_t>(data[4]) << 24) |
+                      (static_cast<uint32_t>(data[5]) << 16) |
+                      (static_cast<uint32_t>(data[6]) << 8) |
+                      (static_cast<uint32_t>(data[7])));

-    m_output_height = ((data[8] << 24) |
-                       (data[9] << 16) |
-                       (data[10] << 8) |
-                       (data[11]));
+    m_output_height = ((static_cast<uint32_t>(data[8]) << 24) |
+                       (static_cast<uint32_t>(data[9]) << 16) |
+                       (static_cast<uint32_t>(data[10]) << 8) |
+                       (static_cast<uint32_t>(data[11])));
   }
   else {
-    m_output_width = ((data[4] << 8) |
-                      (data[5]));
+    m_output_width = ((static_cast<uint32_t>(data[4]) << 8) |
+                      (static_cast<uint32_t>(data[5])));

-    m_output_height = ((data[6] << 8) |
-                       (data[7]));
+    m_output_height = ((static_cast<uint32_t>(data[6]) << 8) |
+                       (static_cast<uint32_t>(data[7])));
   }

   return Error::Ok;