Bug 486679 - misleading embedding assertion about NS_APP_USER_PROFILE_50_DIR not being defined, r=bsmedberg

toolkit/xre/nsXREDirProvider.cpp

@@ -130,7 +130,8 @@ nsXREDirProvider::Initialize(nsIFile *aXULAppDir,
     if (app) {
       PRBool per = PR_FALSE;
       app->GetFile(NS_APP_USER_PROFILE_50_DIR, &per, getter_AddRefs(mProfileDir));
-      NS_ASSERTION(per, "NS_APP_USER_PROFILE_50_DIR no defined! This shouldn't happen!"); 
+      NS_ASSERTION(per, "NS_APP_USER_PROFILE_50_DIR must be persistent!"); 
+      NS_ASSERTION(mProfileDir, "NS_APP_USER_PROFILE_50_DIR not defined! This shouldn't happen!"); 
     }
   }