qemu: monitor: clear cpu props properly in CPUInfoClear
qemu: monitor: clear cpu props properly in CPUInfoClear

Stay true to the name of the function and clear the pointer
after freeing it.

This also silences a bogus Coverity report about a double
free in qemuMonitorGetCPUInfo where qemuMonitorCPUInfoClear
is called right after allocating a new qemuMonitorCPUInfo
to fill out the non-zero defaults.

Signed-off-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>
Reviewed-by: Erik Skultety <2c14d38fa47c8799f1b9c16280abe27f8edfec6e@redhat.com>

libvirt/libvirt,crobinso/libvirt,libvirt/libvirt,zippy2/libvirt,libvirt/libvirt,zippy2/libvirt,jfehlig/libvirt,nertpinx/libvirt,crobinso/libvirt,nertpinx/libvirt,libvirt/libvirt,crobinso/libvirt,crobinso/libvirt,olafhering/libvirt,zippy2/libvirt,nertpinx/libvirt,nertpinx/libvirt,jfehlig/libvirt,nertpinx/libvirt,jfehlig/libvirt,zippy2/libvirt,olafhering/libvirt,olafhering/libvirt,olafhering/libvirt,jfehlig/libvirt