Fix: change defined WIN32

[Jamaika1]

No description provided.

[OgreTransporter]

Let's look at a truth table:

i	WIN32	WIN64	GNUC	A	B
1	false	false	3	true	true
2	false	true	3	false	true
3	true	false	3	false	true
4	true	true	3	false	false
5	false	false	4	true	true
6	false	true	4	false	true
7	true	false	4	false	true
8	true	true	4	false	true

A: !defined(_WIN32) && !defined(_WIN64)
B: ((!defined(_WIN32) || !defined(_WIN64)) || __GNUC__ > 3)

For MSVC the expression __GNUC__ > 3 is always false. This means that A and B must be identical in the first four lines - otherwise the result is wrong!

[Jamaika1]

OK. Change the expression A and B is identical

[OgreTransporter]

Are you sure this is right?

B: #if ((!defined(_WIN32) && !defined(_WIN64)) || (defined(__MINGW32__) && defined(__MINGW64__))) /* The following definition is applicable only for non-windows platform */

WIN32	WIN64	MINGW32	MINGW64	A	B
false	false	false	false	true	true
true	false	false	false	false	false
false	true	false	false	false	false
true	true	false	false	false	false
false	false	true	false	true	true
true	false	true	false	false	false
false	true	true	false	false	false
true	true	true	false	false	false
false	false	false	true	true	true
true	false	false	true	false	false
false	true	false	true	false	false
true	true	false	true	false	false
false	false	true	true	true	true
true	false	true	true	false	true
false	true	true	true	false	true
true	true	true	true	false	true

[Jamaika1]

I understand that the query is for the last three lines.
In my opinion: if MINGW32 is true, !WIN32 is always false.
If MINGW64 is true, !WIN64 is always false.
I don't know how is it for other platforms? No windows and no mingw.