vapoursynth: Check if registry key or value exists

mingw-w64-vapoursynth/0004-vapoursynth-check-empty-registry.patch

@@ -0,0 +1,11 @@
+--- a/src/core/vscore.cpp
++++ b/src/core/vscore.cpp
+@@ -1862,7 +1862,7 @@
+ 
+         // Autoload bundled plugins
+         std::wstring corePluginPath = readRegistryValue(VS_INSTALL_REGKEY, L"CorePlugins");
+-        if (!loadAllPluginsInPath(corePluginPath, filter))
++        if (!corePluginPath.empty() && !loadAllPluginsInPath(corePluginPath, filter))
+             logMessage(mtCritical, "Core plugin autoloading failed. Installation is broken!");
+ 
+         if (!disableAutoLoading) {

mingw-w64-vapoursynth/PKGBUILD

@@ -24,11 +24,13 @@ makedepends=("${MINGW_PACKAGE_PREFIX}-cc"
 source=("vapoursynth-${pkgver}.tar.gz::https://github.com/vapoursynth/vapoursynth/archive/R${pkgver}.tar.gz"
         "0001-wrong-arguments-to-Mem32-constructor.patch"
         "0002-prevent-portable-python.patch"
-        "0003-no-registry-setup-py.patch")
+        "0003-no-registry-setup-py.patch"
+        "0004-vapoursynth-check-empty-registry.patch")
 sha256sums=('2bde5233b82d914b5e985119ed9cc344e3c27c3c068b5c4ab909176cd1751dce'
             '085331d7c81da760b66864ec34647094384514689e7ea9895e7bd34ed9ce9831'
             'bc75208eb672446a23535455040d0f5a7e49e19e8276773dd9bc30ee87da2e27'
-            'a406e46147de0bccbd7353c26a9620a21524376e408131a346ce47df9985b946')
+            'a406e46147de0bccbd7353c26a9620a21524376e408131a346ce47df9985b946'
+            'b2fac3089dfb73dfb8baf5bf398831e54da498314dae1f399129c41a6b41bda1')
 
 _apply_patch_with_msg() {
   for _patch in "$@"
@@ -47,7 +49,8 @@ prepare() {
   _apply_patch_with_msg \
     0001-wrong-arguments-to-Mem32-constructor.patch \
     0002-prevent-portable-python.patch \
-    0003-no-registry-setup-py.patch
+    0003-no-registry-setup-py.patch \
+    0004-vapoursynth-check-empty-registry.patch
 
   autoreconf -vfi
 }