Adding hook for preloader; r=peterl, sr=attinasi

parser/htmlparser/src/nsParserModule.cpp

@@ -356,3 +356,14 @@ extern "C" NS_EXPORT nsresult NSGetModule(nsIComponentManager *servMgr,
   gModule = m;                  // WARNING: Weak Reference
   return rv;
 }
+
+
+#ifdef XP_WIN32
+  //in addition to returning a version number for this module,
+  //this also provides a convenient hook for the preloader
+  //to keep (some if not all) of the module resident.
+extern "C" __declspec(dllexport) float GetVersionNumber(void) {
+  return 1.0;
+}
+#endif
+