PHP Extensions “0” must be loaded , while installing magento-1.7.0.2

This is a wearied problem facing very often when installing Magento. The following way is perfect for magento 1.7.0.2
Replace in file app/code/core/Mage/Install/etc/config.xml (near 71th string) this

<extensions>
<pdo_mysql/>
</extensions>

with this

<extensions>
<pdo_mysql>1</pdo_mysql>
</extensions>
So now i’m trying with this solution and it seems to be working at the moment