Fixing the machine integer types for Clang on Cygwin

--- /usr/include/machine/_default_types.h   2014-02-16 22:58:57.762432000 -0500
+++ /usr/include/machine/_default_types.h   2014-02-16 21:05:32.428189100 -0500
@@ -23,7 +23,7 @@
 extern "C" {
 #endif

-#ifdef __INT8_TYPE__
+#if defined(__INT8_TYPE__) && defined(__UINT8_TYPE__)
 typedef __INT8_TYPE__ __int8_t;
 typedef __UINT8_TYPE__ __uint8_t;
 #define ___int8_t_defined 1
@@ -33,7 +33,7 @@
 #define ___int8_t_defined 1
 #endif

-#ifdef __INT16_TYPE__
+#if defined(__INT16_TYPE__) && defined(__UINT16_TYPE__)
 typedef __INT16_TYPE__ __int16_t;
 typedef __UINT16_TYPE__ __uint16_t;
 #define ___int16_t_defined 1
@@ -51,7 +51,7 @@
 #define ___int16_t_defined 1
 #endif

-#ifdef __INT32_TYPE__
+#if defined(__INT32_TYPE__) && defined(__UINT32_TYPE__)
 typedef __INT32_TYPE__ __int32_t;
 typedef __UINT32_TYPE__ __uint32_t;
 #define ___int32_t_defined 1
@@ -73,7 +73,7 @@
 #define ___int32_t_defined 1
 #endif

-#ifdef __INT64_TYPE__
+#if defined(__INT64_TYPE__) && defined(__UINT64_TYPE__)
 typedef __INT64_TYPE__ __int64_t;
 typedef __UINT64_TYPE__ __uint64_t;
 #define ___int64_t_defined 1
@@ -164,7 +164,7 @@
 #define ___int_least64_t_defined 1
 #endif

-#ifdef __INTPTR_TYPE__
+#if defined(__INTPTR_TYPE__) && defined(__UINTPTR_TYPE__)
 typedef __INTPTR_TYPE__ __intptr_t;
 typedef __UINTPTR_TYPE__ __uintptr_t;
 #elif defined(__PTRDIFF_TYPE__)