Bug 673815 - Fix Synaptics touchpad scrolling hack requirement detection. r=jmathies

widget/src/windows/nsWindow.cpp

@@ -8985,7 +8985,7 @@ void nsWindow::InitInputWorkaroundPrefDefaults()
     sDefaultTrackPointHack = PR_TRUE;
   } else if ((HasRegistryKey(HKEY_CURRENT_USER, L"Software\\Synaptics\\SynTPEnh\\UltraNavUSB") ||
               HasRegistryKey(HKEY_CURRENT_USER, L"Software\\Synaptics\\SynTPEnh\\UltraNavPS2")) &&
-              elantechDriverVersion != 0 && elantechDriverVersion <= 8) {
+              IsObsoleteSynapticsDriver()) {
     sDefaultTrackPointHack = PR_TRUE;
   }