message: fixed copy past error
diff: @@ -54,11 +54,11 @@ impl fmt::Display for CommonError {
  CommonError::InvalidParam2(ref description) => write!(f, "Invalid param 2: {}", description),
  CommonError::InvalidParam3(ref description) => write!(f, "Invalid param 3: {}", description),
  CommonError::InvalidParam4(ref description) => write!(f, "Invalid param 4: {}", description),
  - CommonError::InvalidParam5(ref description) => write!(f, "Invalid param 4: {}", description),
  - CommonError::InvalidParam6(ref description) => write!(f, "Invalid param 4: {}", description),
  - CommonError::InvalidParam7(ref description) => write!(f, "Invalid param 4: {}", description),
  - CommonError::InvalidParam8(ref description) => write!(f, "Invalid param 4: {}", description),
  - CommonError::InvalidParam9(ref description) => write!(f, "Invalid param 4: {}", description),
  + CommonError::InvalidParam5(ref description) => write!(f, "Invalid param 5: {}", description),
  + CommonError::InvalidParam6(ref description) => write!(f, "Invalid param 6: {}", description),
  + CommonError::InvalidParam7(ref description) => write!(f, "Invalid param 7: {}", description),
  + CommonError::InvalidParam8(ref description) => write!(f, "Invalid param 8: {}", description),
  + CommonError::InvalidParam9(ref description) => write!(f, "Invalid param 9: {}", description),
  CommonError::InvalidState(ref description) => write!(f, "Invalid library state: {}", description),
  CommonError::InvalidStructure(ref description) => write!(f, "Invalid structure: {}", description),
  CommonError::IOError(ref err) => err.fmt(f)
  