Minor fixes.

src/nvcore/DefsVcWin32.h

@@ -29,7 +29,9 @@
 #   define strtoll _strtoi64
 #   define strtoull _strtoui64
 #endif
-#define chdir _chdir
+#if _MSC_VER < 1900
+#   define chdir _chdir
+#endif
 #define getcwd _getcwd 
 
 #if _MSC_VER < 1800 // Not sure what version introduced this.

src/nvcore/FileSystem.cpp

@@ -6,7 +6,7 @@
 #define _CRT_NONSTDC_NO_WARNINGS // _chdir is defined deprecated, but that's a bug, chdir is deprecated, _chdir is *not*.
 //#include <shlwapi.h> // PathFileExists
 #include <windows.h> // GetFileAttributes
-#include <direct.h> // _mkdir
+#include <direct.h> // _mkdir, _chdir
 #elif NV_OS_XBOX
 #include <Xtl.h>
 #elif NV_OS_ORBIS

src/nvcore/Utils.h

@@ -232,7 +232,7 @@ namespace nv
     inline uint64 nextPowerOfTwo(uint64 x)
     {
         nvDebugCheck(x != 0);
-        uint p = 1;
+        uint64 p = 1;
         while (x > p) {
             p += p;
         }