message: Don't crash on linux if getenv() returns NULL for unknown variable
diff: @@ -43,5 +43,9 @@ std::string GetCWD()
  std::string GetEnvVar(const char *var)
  {
  - return getenv(var);
  + const char *data = getenv(var);
  + if(data)
  + return data;
  +
  + return "";
  }
  \ No newline at end of file
  