Description:
------------
When reading GPS EXIF tags, PHP seems to use the GPS version tag to determine the byte order of the other GPS tags instead of the byte order indicator from the EXIF header. An image that shows the incorrect behavior is at http://www.drbeat.li/test/testgps.jpg .

In this picture, the GPS tag version is stored as the bytes [0, 0, 2, 2] instead of as [2, 2, 0, 0]. exif_read_data() consequently returns wrong fractions for latitude, longitude and altitude.

Reproduce code:
---------------
if (($exif = @exif_read_data($file, 0, true)) !== false && $exif['GPS'])
    print_r($exif['GPS']);


Expected result:
----------------
Array
(
    [GPSVersion] => ????
    [GPSLatitudeRef] => N
    [GPSLatitude] => Array
        (
            [0] => 47/1
            [1] => 8/1
            [2] => 96/25
        )
    [GPSLongitudeRef] => E
    [GPSLongitude] => Array
        (
            [0] => 7/1
            [1] => 13/1
            [2] => 60801/1250
        )
    [GPSAltitudeRef] => ?
    [GPSAltitude] => 436/1
)

Actual result:
--------------
Array
(
    [GPSVersion] => ????
    [GPSLatitudeRef] => N
    [GPSLatitude] => Array
        (
            [0] => 196608/3276800
            [1] => 65536/2004877312
            [2] => 57999413/-1526726656
        )
    [GPSLongitudeRef] => E
    [GPSLongitude] => Array
        (
            [0] => 38666275/3080192
            [1] => 65536/524288
            [2] => 65536/6291456
        )
    [GPSAltitudeRef] => ?
    [GPSAltitude] => 1638400/458752
)