Bug 1063469 - fix some trivial "assignment to undeclared variable" in extApplication.js. r=Neil

toolkit/components/exthelper/extApplication.js

@@ -586,8 +586,8 @@ Extensions.prototype = {
 //=================================================
 // Application globals
 
-gExtensionObserver = new ExtensionObserver();
-gPreferenceObserver = new PreferenceObserver();
+var gExtensionObserver = new ExtensionObserver();
+var gPreferenceObserver = new PreferenceObserver();
 
 //=================================================
 // extApplication constructor