Description:
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I just upgraded to the SVN to be able to use the new Imagick::setColorspace() method, but I still get this error:

 Call to undefined method Imagick::setColorspace()

when I attempt:

$im->setColorspace(Imagick::COLORSPACE_RGB);

Thanks,
Adrian

Reproduce code:
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$im = new imagick();
$im->setOption("pdf:use-cropbox","true");
$im->setColorspace(Imagick::COLORSPACE_RGB);
$im->setResolution($resolution,$resolution);
$im->readImage($pdf_filepath);

$im->setImageFormat("jpg");
$im->scaleImage($width, $height);
$im->writeImage($jpg_filepath);

header("Content-type: image/jpeg");
echo $im;

Expected result:
----------------
Set the colorspace before reading the image

Actual result:
--------------
This error and no image produced

Call to undefined method Imagick::setColorspace()