Prevented ede-screensaver-conf to crash when xscreensaver is not installed.

Default desktop files will be installed during compilation time; if this was done during installation
time, files will be installed in superuser directory, which isn't the goal.

Fixed Jamfile to use correct path.

data/desktop-links/Jamfile

@@ -10,9 +10,11 @@
 
 SubDir TOP data desktop-links ;
 
-actions InstallIfEmpty
+actions quietly existing InstallIfEmpty
 {
-	./$(SUBDIR)/install-in-desktop-dir.sh
+	./$(>)/install-in-desktop-dir.sh
 }
 
-InstallIfEmpty install ;
+# use 'all' pseudotarget not 'install' because 'install' will be often run as superuser, installing 
+# data in superuser directory, not user directory
+InstallIfEmpty all : $(SUBDIR) ;

data/desktop-links/install-in-desktop-dir.sh

@@ -12,6 +12,8 @@ content=`ls $desktop_dir/*.desktop 2>>/dev/null`
 
 # check if directory is empty and install if it does
 if test "x$content" = "x"; then
+	echo "Preparing $desktop_dir for the first time..."
+
 	for file in $targets; do
 		cp $curr_dir/$file $desktop_dir
 	done