Fix: [Cygwin] Fix missing uint definition

In file included from src/settingsgen/../string_func.h:30,
                 from src/settingsgen/settingsgen.cpp:11:
src/settingsgen/../core/bitmath_func.hpp:34:15: error: 'uint' does not name a type; did you mean 'uint8'?
   34 | static inline uint GB(const T x, const uint8 s, const uint8 n)
      |               ^~~~
      |               uint8

src/stdafx.h

@@ -306,8 +306,8 @@
 
 typedef unsigned char byte;
 
-/* This is already defined in unix, but not in QNX Neutrino (6.x)*/
-#if (!defined(UNIX) && !defined(__HAIKU__)) || defined(__QNXNTO__)
+/* This is already defined in unix, but not in QNX Neutrino (6.x) or Cygwin. */
+#if (!defined(UNIX) && !defined(__HAIKU__)) || defined(__QNXNTO__) || defined(__CYGWIN__)
 	typedef unsigned int uint;
 #endif