Fix LocalAlloc/LocalFree definitions

Railgun should not be using DWORD for pointer sizes because it breaks
things on 64-bit sessions.

Fixes #18544

Author: zeroSteiner

lib/rex/post/meterpreter/extensions/stdapi/railgun/def/windows/def_kernel32.rb

@@ -2300,7 +2300,7 @@ def self.create_library(constant_manager, library_path = 'kernel32')
       ["HANDLE","hResInfo","in"],
       ])
 
-    dll.add_function( 'LocalAlloc', 'DWORD',[
+    dll.add_function( 'LocalAlloc', 'HANDLE',[
       ["DWORD","uFlags","in"],
       ["DWORD","uBytes","in"],
       ])
@@ -2318,7 +2318,7 @@ def self.create_library(constant_manager, library_path = 'kernel32')
       ["HANDLE","hMem","in"],
       ])
 
-    dll.add_function( 'LocalFree', 'DWORD',[
+    dll.add_function( 'LocalFree', 'HANDLE',[
       ["HANDLE","hMem","in"],
       ])