Resource injection fails on Win 8.1 x86 image

[iainbrighton]

When injecting resources and VM customisations on Win 8.1 x86 image fails with

VERBOSE: [20:52:05] Mounting disk image 'D:\TestLab\VM Disks\WIN81.vhdx'.
Cannot the drive letter for disk image 'd:\testlab\vm disks\win81.vhdx'. The parent disk image may be corrupted or
recreate the master image.
At C:\Users\Iain\OneDrive\PowerShell\Modules\VirtualEngineLab\Lib\DiskImage.ps1:18 char:13
+             throw ($localized.CannotLocateDiskImageLetter -f $DiskIma ...
+             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OperationStopped: (Cannot the driv...e master image.:String) [], RuntimeException
    + FullyQualifiedErrorId : Cannot the drive letter for disk image 'd:\testlab\vm disks\win81.vhdx'. The parent disk
    image may be corrupted or recreate the master image.

[iainbrighton]

x86 VMs are created with a MBR boot record, whilst x64 VMs are creadted with a GPT boot record. This results in different partition types. Need to add x86/x64 detection to both the SetLabVMDiskFile and SetLabVMDiskResource functions.