message: ctype: fix isspace to test all space class characters
diff: @@ -54,7 +54,12 @@ pub extern "C" fn ispunct(c: c_int) -> c_int {
  #[no_mangle]
  pub extern "C" fn isspace(c: c_int) -> c_int {
  - (c == 0x20) as c_int
  + (c == ' ' as c_int
  + || c == '\t' as c_int
  + || c == '\n' as c_int
  + || c == '\r' as c_int
  + || c == 0x0b
  + || c == 0x0c) as c_int
  }
  #[no_mangle]
  