OneWireDS18B20ThermometerDevice>temperature problem

[PhotonCoder15]

OneWireDS18B20ThermometerDevice>temperature fails to close the file after reading it. See new code below.

temperature
"Answer the current temperature value of this device. It is possible the device may not have reported a correct list
of data, so return 999 as a placeholder"
| file data pos tStr |

file := CfsReadFileStream open: devFilePath.
file isCfsError ifFalse: [
	data := file contents.
            file close.                                    "This is the new line."
	((data indexOfSubCollection: 'YES') > 0) ifTrue: [
		pos := data indexOfSubCollection: 't='.
		(pos > 0) ifTrue: [
			tStr := data copyFrom: pos + 2 to: data size.
			^tStr asNumber / 1000.0.
		].
	].
].
^999.