fix implementation of much simpler visual studio printing
diff --git a/tinyxml2.cpp b/tinyxml2.cpp
index ef33c4e..a64dad6 100755
--- a/tinyxml2.cpp
+++ b/tinyxml2.cpp
@@ -1855,7 +1855,7 @@
         vfprintf( _fp, format, va );

     }

     else {

-#ifdef _MSC_VER

+#if defined(_MSC_VER) && (_MSC_VER >= 1400 )

         int len = _vscprintf( format, va );

 #else

         int len = vsnprintf( 0, 0, format, va );

@@ -1863,8 +1863,12 @@
         // Close out and re-start the va-args

         va_end( va );

         va_start( va, format );

-        char* p = _buffer.PushArr( len ) - 1;

-        vsnprintf( p, len+1, format, va );

+        char* p = _buffer.PushArr( len ) - 1;	// back up over the null terminator.

+#if defined(_MSC_VER) && (_MSC_VER >= 1400 )

+		vsnprintf_s( p, len+1, _TRUNCATE, format, va );

+#else

+		vsnprintf( p, len+1, format, va );

+#endif

     }

     va_end( va );

 }