Correct a resource URL so the tab labels will show up correctly.

calendar/resources/content/unifinder/unifinderOverlay.xul

@@ -43,7 +43,7 @@
 <!-- DTD File with all strings specific to the unifinder -->
 <!DOCTYPE window 
 [
-    <!ENTITY % dtd1 SYSTEM "chrome://global/locale/global.dtd" > %dtd1;
+    <!ENTITY % dtd1 SYSTEM "chrome://calendar/locale/global.dtd" > %dtd1;
     <!ENTITY % dtd2 SYSTEM "chrome://calendar/locale/unifinder.dtd" > %dtd2;
 	<!ENTITY % dtd3 SYSTEM "chrome://calendar/locale/calendar.dtd" > %dtd3;
 ]>