ONT source code changes to compile with MSVC 14

kthread.c

@@ -1,6 +1,13 @@
 #include <pthread.h>
 #include <stdlib.h>
 #include <limits.h>
+#include <stdint.h>
+
+#ifdef WIN32
+#include <malloc.h>
+#define alloca _alloca
+#define __sync_fetch_and_add(ptr, addend)     _InterlockedExchangeAdd((void*)ptr, addend)
+#endif
 
 /************
  * kt_for() *