[PATCH 3/5] conf: Don't format cputune element when not needed

[Martin Kletzander <mkletzan@xxxxxxxxxx>]

Commit 60b176c3d0f0d5037acfa5e27c7753f657833a0b introduced a bug that
when editing an XML with cputune similar to this:

...
  <vcpu placement='static' current='1'>2</vcpu>
  <cputune>
    <vcpupin vcpu="1" cpuset="0"/>
  </cputune>
...

results in formatted XML that looks like this:

...
  <vcpu placement='static' current='1'>2</vcpu>
  <cputune>
  </cputune>
...

That is caused by a condition depending on def->cputune.vcpupin being
set rather than checking def->cputune.nvcpupin.  Notice that nvcpupin
can be 0 and vcpupin can still be allocated since it's a pointer to an
array, so no harm done there.
---
 src/conf/domain_conf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index cba910a..329ada3 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -13896,7 +13896,7 @@ virDomainDefFormatInternal(virDomainDefPtr def,
     virBufferAsprintf(buf, ">%u</vcpu>\n", def->maxvcpus);

     if (def->cputune.shares ||
-        (def->cputune.vcpupin && !virDomainIsAllVcpupinInherited(def)) ||
+        (def->cputune.nvcpupin && !virDomainIsAllVcpupinInherited(def)) ||
         def->cputune.period || def->cputune.quota ||
         def->cputune.emulatorpin ||
         def->cputune.emulator_period || def->cputune.emulator_quota)
-- 
1.8.0.2

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