llvm 13 enum cast

cast.diff

diff --git a/src/zig_clang.cpp b/src/zig_clang.cpp
index a6b4683a4..e6d1102ca 100644
--- a/src/zig_clang.cpp
+++ b/src/zig_clang.cpp
@@ -1051,7 +1051,7 @@ static_assert((clang::Decl::Kind)ZigClangDeclStaticAssert == clang::Decl::Static
 static_assert((clang::Decl::Kind)ZigClangDeclTranslationUnit == clang::Decl::TranslationUnit, "");
 
 void ZigClang_detect_enum_BuiltinTypeKind(clang::BuiltinType::Kind x) {
-    switch (x) {
+    switch (static_cast<ZigClangBuiltinTypeKind>(x)) {
         case ZigClangBuiltinTypeOCLImage1dRO:
         case ZigClangBuiltinTypeOCLImage1dArrayRO:
         case ZigClangBuiltinTypeOCLImage1dBufferRO: