handle double '/' in the boost::filesystem

[rsrus]

Hi.

Sometimes I make some path by hand. For example

  std::string str = "./";
  //... some code ....
  std::string str2 = str + "/path/to/file";

The result is ".//path/to/file". If I try to make path
from it:

   boost::filesystem::path fs_path2(str2, fs::native);

I got exception. Is it possible to correct function

   path::m_path_append

to handle this situation (double/triple/... separator
in the middle of string)?