fix for radio item not being selected after picking internal browser

reviewed by Callum

indra/newview/skins/default/xui/en/panel_preferences_setup.xml

@@ -273,7 +273,7 @@
       layout="topleft"
       left="0"
       name="internal"
-      value="0"
+      value=""
       tool_tip="Use the built-in web browser for help, web links, etc. This browser opens as a new window inside [APP_NAME]."
       top="0"
       width="480" />
@@ -283,7 +283,7 @@
       layout="topleft"
       left_delta="0"
       name="external"
-      value="1"
+      value="true"
       tool_tip="Use the default system web browser for help, web links, etc. Not recommended if running full screen."
       top_delta="20"
       width="480" />