message: Add missing PUGI__FN to string_to_integer
diff: @@ -4439,7 +4439,7 @@ PUGI__NS_BEGIN
  }
  // get value with conversion functions
  - template <typename U> U string_to_integer(const char_t* value, U minneg, U maxpos)
  + template <typename U> PUGI__FN U string_to_integer(const char_t* value, U minneg, U maxpos)
  {
  U result = 0;
  const char_t* s = value;
  