USB joysticks can and do provide dead-zone area. Use it to initialize
the initial dead-zone.

msi: Fix the MsiEnumProductsEx*(), MsiQueryComponentState*() and MsiProvideQualifiedComponentEx*() prototypes.

Also add some prototypes to lmuse.h, and use it in the implementation.

Also note that lmbrowsr.h is no longer present in current PSDKs.

Add many missing prototypes which we already had in dbghelp.h, and their related structures.
Update win32.api to fix the winapi_check warnings.