How to correctly set 'price_changes' via API Soap V2

[serifreedom]

Hello Jreinke,
Thank you so much for a good free extension, I've tried improve-api with Magento ver. 1.9.0.1 CE
by call api soap v2, everything seem great... except!
when I define price_changes:

 'price_changes' => array(
            array(
                'color' => array(
                    'Red' => '2',
                    'White' => '-10%',
                ),
                'size' => array(
                    '7'  => '+1',
                    '7-'   => '-3',
                ),
            ),
        ),

error occurred :
SOAP-ERROR: Encoding: object has no 'key' property

[velvetrevolver]

I had same problem, you need to use key/value pair for each value. But this add a "stdClass as array" bug I've fixed. I posted the solution, a working example for 1.9.0.1, on Jreinke website and the fix on a fork :
velvetrevolver@83b1f31