Fixed a C++ bool variable(1 byte) to WINAPI bool(4 bytes) for SystemParametersInfo API.

This update would be expected to fix a locale related crash problem like ar_SA at startup.

http://msdn.microsoft.com/en-us/library/windows/desktop/ms724947(v=vs.85).aspx

![bools](https://cloud.githubusercontent.com/assets/8752391/4654913/701dc286-54bc-11e4-81e6-79278fa33f32.png)

![before-after](https://cloud.githubusercontent.com/assets/8752391/4654916/72c01052-54bc-11e4-8ab9-9463ea3af5d8.png)

At least a random crash when starting up pcsx2 on my PC was fixed.