smb_file_exist check for rubysmb

lib/msf/core/exploit/smb/client.rb

@@ -220,6 +220,8 @@ module Msf
       def smb_file_exist?(file)
         begin
           fd = simple.open(file, 'o')
+        rescue RubySMB::Error::UnexpectedStatusCode => e
+          found = false
         rescue Rex::Proto::SMB::Exceptions::ErrorCode => e
           # If attempting to open the file results in a "*_NOT_FOUND" error,
           # then we can be sure the file is not there.