Merge pull request #1494 from veera-sivarajan/c23-variadics

Mention Variadics With No Fixed Parameter

src/items/external-blocks.md

@@ -97,13 +97,13 @@ There are also some platform-specific ABI strings:
 ## Variadic functions
 
 Functions within external blocks may be variadic by specifying `...` as the
-last argument. There must be at least one parameter before the variadic
-parameter. The variadic parameter may optionally be specified with an
+last argument. The variadic parameter may optionally be specified with an
 identifier.
 
 ```rust
 extern "C" {
- fn foo(x: i32, ...);
+ fn foo(...);
+ fn bar(x: i32, ...);
  fn with_name(format: *const u8, args: ...);
 }
 ```