CWG3082 Allow for call-compatible function types in reinterpret_cast

Fixes NB US 30-061 (C++26 CD).

Author: eisenwave

source/expressions.tex

@@ -4962,17 +4962,13 @@
 \indextext{cast!undefined pointer-to-function}%
 A function pointer can be explicitly converted
 to a function pointer of a different type.
+The function pointer value is unchanged by the conversion.
 \indextext{function call!undefined}%
 \begin{note}
 The effect of calling a function through a pointer to a function
-type\iref{dcl.fct} that is not the same as the type used in the
+type\iref{dcl.fct} that is not call-compatible with the type used in the
 definition of the function is undefined\iref{expr.call}.
 \end{note}
-Except that converting
-a prvalue of type ``pointer to \tcode{T1}'' to the type ``pointer to
-\tcode{T2}'' (where \tcode{T1} and \tcode{T2} are function types) and
-back to its original type yields the original pointer value, the result
-of such a pointer conversion is unspecified.
 
 \pnum
 An object pointer