Windows build fix

This was SVN commit r7260.

source/tools/atlas/AtlasScript/ScriptInterface.h

@@ -32,6 +32,12 @@
 // (There are a few places where SM really needs to be told to be threadsafe, even
 // though we're not actually sharing runtimes between threads.)
 
+#if JS_VERSION <= 160
+// 1.6 doesn't support the standards-conforming globals behaviour,
+// so we can't use this flag there
+# define JSCLASS_GLOBAL_FLAGS 0
+#endif
+
 class wxWindow;
 class wxString;
 class wxPanel;