Move 4451 to Immediate

Author: jwakely

xml/issue4451.xml

@@ -1,7 +1,7 @@
 <?xml version='1.0' encoding='utf-8' standalone='no'?>
 <!DOCTYPE issue SYSTEM "lwg-issue.dtd">
 
-<issue num="4451" status="New">
+<issue num="4451" status="Immediate">
 <title>`make_shared` should not refer to a type `U[N]` for runtime N</title>
 <section><sref ref="[util.smartptr.shared.create]"/></section>
 <submitter>Jonathan Wakely</submitter>
@@ -14,7 +14,11 @@
 The overloads of `make_shared` and `allocate_shared` for creating
 <code>shared_ptr&lt;T[]&gt;</code> refer to an object a type `U[N]`
 where `N` is a function parameter not a constant expression.
+Since `N` is allowed to be zero, this also allows `U[0]` which is
+an invalid type and so totally ill-formed.
 </p>
+
+<note>Kona 2025-11-06; approved by LWG. Status changed: New &rarr; Immediate.</note>
 </discussion>
 
 <resolution>