Imperative api is sort of working now. Fixed various bugs.

src/nvcore/DefsGnucWin32.h

@@ -2,6 +2,8 @@
 #error "Do not include this file directly."
 #endif
 
+#include <cstddef> // size_t, NULL
+
 // Function linkage
 #define DLL_IMPORT	__declspec(dllimport)
 #define DLL_EXPORT	__declspec(dllexport)

src/nvcore/StrLib.cpp

@@ -542,7 +542,7 @@ const char * Path::extension(const char * str)
     l = length = (int)strlen( str );
     while (length > 0 && str[length] != '.') {
         length--;
-        if (str[length] != '\\' || str[length] != '/') {
+        if (str[length] == '\\' || str[length] == '/') {
             return &str[l]; // no extension
         }
     }

src/nvcore/nvcore.h

@@ -154,9 +154,6 @@
 /// Null index. @@ Move this somewhere else... This could have collisions with other definitions!
 #define NIL uint(~0)
 
-// @@ Move this to DefsGnuc?
-#include <cstddef> // size_t, NULL
-
 /// Null pointer.
 #ifndef NULL
 #define NULL 0