KVM: PPC: fix uninitialized variable warning in kvm_ppc_core_deliver_interrupts

Fixes:
arch/powerpc/kvm/booke.c: In function 'kvmppc_core_deliver_interrupts':
arch/powerpc/kvm/booke.c:147: warning: 'msr_mask' may be used uninitialized in this function
Signed-off-by: NAsias He <asias.hejun@gmail.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

arch/powerpc/kvm/booke.c

@@ -144,7 +144,7 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
                                         unsigned int priority)
 {
 	int allowed = 0;
-	ulong msr_mask;
+	ulong uninitialized_var(msr_mask);
 	bool update_esr = false, update_dear = false;
 
 	switch (priority) {