KVM: selftests: x86: sync_regs_test: Get regs structure before modifying it

The regs structure just accidentally contains the right values
from the previous test in the spot where we want to change rbx.
It's cleaner if we properly initialize the structure here before
using it.

Suggested-by: Sean Christopherson <[email protected]>
Signed-off-by: Thomas Huth <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Sean Christopherson <[email protected]>

Author: huth

tools/testing/selftests/kvm/x86_64/sync_regs_test.c

@@ -315,6 +315,7 @@ int main(int argc, char *argv[])
 	run->kvm_valid_regs = 0;
 	run->kvm_dirty_regs = 0;
 	run->s.regs.regs.rbx = 0xAAAA;
+	vcpu_regs_get(vcpu, &regs);
 	regs.rbx = 0xBAC0;
 	vcpu_regs_set(vcpu, &regs);
 	vcpu_run(vcpu);