print warning only in debug mode, Closes: #826897

bin/fcopy

@@ -5,7 +5,7 @@
 # fcopy -- copy files using FAI classes and preserve directory structure
 #
 # This script is part of FAI (Fully Automatic Installation)
-# Copyright (C) 2000-2015 Thomas Lange, lange@informatik.uni-koeln.de
+# Copyright (C) 2000-2016 Thomas Lange, lange@informatik.uni-koeln.de
 # Universitaet zu Koeln
 # Copyright (C) 2001-2005 Henning Glawe, glaweh@physik.fu-berlin.de
 # Freie Univeritaet Berlin
@@ -89,7 +89,7 @@ sub copy_one {
 
   # $prefix/$source must be a directory
   if (-f $ps) { ewarn("$ps is a file, but must be a directory containing templates.");return };
-  unless (-d $ps) { ewarn("Nonexisting directory $ps. No files copied.");return }
+  unless (-d $ps) { ewarn("Nonexisting directory $ps. No files copied.") if $debug;return }
 
   # use the last class for which a file exists
   foreach (@classes) { $class = $_,last if -f "$ps/$_" || ($opt_H && -l "$ps/$_"); }