parallels: fix headers in parallels_sdk.h
parallels: fix headers in parallels_sdk.h

Return value of functions prlsdkStart/Kill/Stop e.t.c.
is PRL_RESULT in parallels_sdk.c and int in parallels_sdk.h.
PRL_RESULT is int, so compiler didn't report errors.
Let's fix the difference.

Signed-off-by: Dmitry Guryanov <82bcdc4bd8b0265ee488eb5c489ce233d2f86b5c@parallels.com>

crobinso/libvirt,rlaager/libvirt,andreabolognani/libvirt,jfehlig/libvirt,andreabolognani/libvirt,nertpinx/libvirt,nertpinx/libvirt,rlaager/libvirt,andreabolognani/libvirt,jfehlig/libvirt,nertpinx/libvirt,crobinso/libvirt,fabianfreyer/libvirt,taget/libvirt,nertpinx/libvirt,jardasgit/libvirt,taget/libvirt,agx/libvirt,zippy2/libvirt,eskultety/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,libvirt/libvirt,jardasgit/libvirt,rlaager/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,libvirt/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,olafhering/libvirt,crobinso/libvirt,taget/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,rlaager/libvirt,olafhering/libvirt,crobinso/libvirt,taget/libvirt,eskultety/libvirt,agx/libvirt,agx/libvirt,eskultety/libvirt,libvirt/libvirt,zippy2/libvirt,datto/libvirt,rlaager/libvirt,fabianfreyer/libvirt,zippy2/libvirt,agx/libvirt,libvirt/libvirt,zippy2/libvirt,andreabolognani/libvirt,taget/libvirt,agx/libvirt,VenkatDatta/libvirt,olafhering/libvirt,andreabolognani/libvirt,olafhering/libvirt,jardasgit/libvirt,jfehlig/libvirt,eskultety/libvirt,datto/libvirt,datto/libvirt,datto/libvirt,jardasgit/libvirt,eskultety/libvirt,datto/libvirt,jfehlig/libvirt