libheif: backport 32bit build fix

mingw-w64-libheif/PKGBUILD

@@ -35,8 +35,16 @@ depends=("${MINGW_PACKAGE_PREFIX}-gcc-libs"
             echo "${MINGW_PACKAGE_PREFIX}-svt-av1" )
          "${MINGW_PACKAGE_PREFIX}-x265"
          "${MINGW_PACKAGE_PREFIX}-zlib")
-source=("https://github.com/strukturag/libheif/releases/download/v${pkgver}/${_realname}-${pkgver}.tar.gz")
-sha256sums=('c4002a622bec9f519f29d84bfdc6024e33fd67953a5fb4dc2c2f11f67d5e45bf')
+source=("https://github.com/strukturag/libheif/releases/download/v${pkgver}/${_realname}-${pkgver}.tar.gz"
+        "https://patch-diff.githubusercontent.com/raw/strukturag/libheif/pull/1263.patch")
+sha256sums=('c4002a622bec9f519f29d84bfdc6024e33fd67953a5fb4dc2c2f11f67d5e45bf'
+            '58d309d8da8793d4e5df18df566d7ab5b681fd858d10abdc8dd29b616d1987eb')
+
+prepare() {
+  cd "${_realname}-${pkgver}"
+
+  patch -Np1 -i "${srcdir}/1263.patch"
+}
 
 build() {
   mkdir -p "${srcdir}"/build-${MSYSTEM} && cd "${srcdir}"/build-${MSYSTEM}