Trap an exception that may happen when checking for directories to skip

generatecypher.py

@@ -471,7 +471,10 @@ def main(argv):
         dirwalker = os.walk(dirtoscan)
 
         for root, dirs, files in os.walk(dirtoscan, topdown = True):
-            [dirs.remove(d) for d in list(dirs) for s in skipdirs if root.startswith(s)]
+            try:
+                [dirs.remove(d) for d in list(dirs) for s in skipdirs if root.startswith(s)]
+            except:
+                continue
             for filename in files:
                 fullfilename = os.path.join(root, filename)