Added validation for existence of files linked from folk.csv

scripts/make-folklist.py

@@ -1,5 +1,5 @@
 #!/usr/bin/python
-import sys, string, re
+import sys, string, re, os
 
 # run within the /folk/ folder:
 # python ../scripts/make-folklist.py <folk.csv >index.htm
@@ -54,6 +54,9 @@ for r in lines[1:]:
 	output += '</td><td>'
 	if vfho: output += '&curren;'
 	output += '</td><td>'
+	if mug:
+		if not (os.path.isfile(mug)):
+			print >> sys.stderr, "ERROR: --------------- mug file does not exist: ", mug 
 	if mug: output += '<a href=%s><img alt=":-)" src="i/mug.png" /></a>' % mug
 	output += '</td>'
 	for y in xrange(len(years)):