Change message "Main template file name is empty." from warning to
debug level. If the template file is not specified, there is no
need to alert the user. This resolves bug 1818.

diff --git a/khelpcenter/formatter.cpp b/khelpcenter/formatter.cpp
index 7188ec2..21e2abb 100644
--- a/khelpcenter/formatter.cpp
+++ b/khelpcenter/formatter.cpp
@@ -51,7 +51,7 @@
   }
   
   if ( mainTemplate.isEmpty() ) {
-    kdWarning() << "Main template file name is empty." << endl;
+    kdDebug() << "Main template file name is empty." << endl;
     return false;
   }