[msi] initialize variable to placate static analyzers

[Michael Stefaniuc]

Hello Dan,

Dan Kegel wrote:
> Avoids the spurious compiler warning
> 
> msi.c: In function 'MSI_ApplyPatchW':
> msi.c:353:10: error: 'r' may be used uninitialized in this function
> 
> Hans says "It's compiler confusion but I'm fine with a patch that initializes
> r with ERROR_FUNCTION_FAILED."
why don't you just initialize r in the declaration of r? It's the
standard way of doing it and doesn't require a suboptimal comment (that
warning is gcc version dependent).

bye
	michael