virSysinfoParseX86BaseBoard: Free memory upfront if no board detected
virSysinfoParseX86BaseBoard: Free memory upfront if no board detected

If no board was detected then VIR_REALLOC_N() done at the end of
the function will actually free the memory (because nborads ==
0), but @boards will be set to a non-NULL pointer. This makes it
unnecessary harder for a caller to see if any board was detected.

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

eskultety/libvirt,eskultety/libvirt,olafhering/libvirt,nertpinx/libvirt,andreabolognani/libvirt,zippy2/libvirt,jardasgit/libvirt,zippy2/libvirt,eskultety/libvirt,andreabolognani/libvirt,jardasgit/libvirt,nertpinx/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,nertpinx/libvirt,libvirt/libvirt,olafhering/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,eskultety/libvirt,jfehlig/libvirt,nertpinx/libvirt,nertpinx/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,crobinso/libvirt,crobinso/libvirt,zippy2/libvirt,jfehlig/libvirt,libvirt/libvirt,olafhering/libvirt,olafhering/libvirt,crobinso/libvirt,fabianfreyer/libvirt,crobinso/libvirt,fabianfreyer/libvirt,libvirt/libvirt,libvirt/libvirt,jardasgit/libvirt,eskultety/libvirt,andreabolognani/libvirt,zippy2/libvirt,jardasgit/libvirt