leaflet, accept valueerrors in json stream

scripts/leaflet.py

@@ -618,9 +618,11 @@ def make_gallery(args):
         for line in sys.stdin:
             line = line.rstrip()
             if line and not line.startswith("#"):
+                try:
                     item = json.loads(line)
                     items.append(item)
-
+                except ValueError as e:
+                    print (u"Error reading line {0}, {1}".format(line, e).encode("utf-8"), file=sys.stderr)
     # Ensure / Generate tiles per image
     # items.sort(key=lambda x: x['url'])
     tiles = []