Add workaround for incorrect StdVideoH265HrdParameters encoding

See https://github.com/KhronosGroup/Vulkan-Docs/issues/2557

src/main.zig

@@ -110,7 +110,12 @@ pub fn main() !void {
 
     var out_buffer = std.ArrayList(u8).init(allocator);
     var w = out_buffer.writer().adaptToNewApi();
-    generator.generate(allocator, api, xml_src, maybe_video_xml_src, &w.new_interface) catch |err| switch (err) {
+    generator.generate(allocator, api, xml_src, maybe_video_xml_src, &w.new_interface) catch |err| {
+        if (debug) {
+            return err;
+        }
+
+        switch (err) {
             error.InvalidXml => {
                 std.log.err("invalid vulkan registry - invalid xml", .{});
                 std.log.err("please check that the correct vk.xml file is passed", .{});
@@ -128,6 +133,7 @@ pub fn main() !void {
                 std.process.exit(1);
             },
             error.OutOfMemory, error.WriteFailed => @panic("oom"),
+        }
     };
 
     out_buffer.append(0) catch @panic("oom");

src/vulkan/parse.zig

@@ -365,10 +365,18 @@ fn parsePointerMeta(fields: Fields, type_info: *registry.TypeInfo, elem: *xml.El
             else => break,
         };
 
-        if (it.next()) |_| {
+        if (it.next()) |_| ignore: {
             // There are more elements in the `len` attribute than there are pointers
             // Something probably went wrong
-            std.log.err("len: {s}", .{lens});
+            switch (current_type_info.*) {
+                .name => |name| if (std.mem.eql(u8, name, "StdVideoH265SubLayerHrdParameters")) {
+                    // Known issue: https://github.com/KhronosGroup/Vulkan-Docs/issues/2557
+                    break :ignore;
+                },
+                else => {},
+            }
+
+            std.log.err("excessive pointer lengths: {s}", .{lens});
             return error.InvalidRegistry;
         }
     }