DL x64 windows fix

win32api.patch

diff --git a/ext/dl/win32/lib/Win32API.rb b/ext/dl/win32/lib/Win32API.rb
index f18cec5..256d596 100644
--- a/ext/dl/win32/lib/Win32API.rb
+++ b/ext/dl/win32/lib/Win32API.rb
@@ -7,6 +7,7 @@ require 'dl'
 class Win32API
   DLL = {}
   TYPEMAP = {"0" => DL::TYPE_VOID, "S" => DL::TYPE_VOIDP, "I" => DL::TYPE_LONG}
+  POINTER_TYPE = DL::SIZEOF_VOIDP == DL::SIZEOF_LONG_LONG ? 'q*' : 'l!*'
 
   def initialize(dllname, func, import, export = "0", calltype = :stdcall)
     @proto = [import].join.tr("VPpNnLlIi", "0SSI").sub(/^(.)0*$/, '\1')
@@ -19,7 +20,7 @@ class Win32API
   def call(*args)
     import = @proto.split("")
     args.each_with_index do |x, i|
-      args[i], = [x == 0 ? nil : x].pack("p").unpack("l!*") if import[i] == "S"
+      args[i], = [x == 0 ? nil : x].pack("p").unpack(POINTER_TYPE) if import[i] == "S"
       args[i], = [x].pack("I").unpack("i") if import[i] == "I"
     end
     ret, = @func.call(args)