37014: Improved internal parameter setting.

Enhance WARNCREATEGLOBAL to work in many more cases.

Don't create REPLY as an integer if it didn't previously exist
as one, even if the value to be set is integral, as this is likely to
mess up later uses of REPLY.

Functions/Misc/add-zsh-hook

@@ -82,9 +82,11 @@ if (( del )); then
 else
   if (( ${(P)+hook} )); then
     if (( ${${(P)hook}[(I)$fn]} == 0 )); then
+      typeset -ga $hook
       set -A $hook ${(P)hook} $fn
     fi
   else
+    typeset -ga $hook
     set -A $hook $fn
   fi
   autoload $autoopts -- $fn