Merge pull request #312 from jazzmes/libvirt-mem-usage

Included memory usage per VM

diff --cc src/libvirt.c
index 7f75d24,8eec9aa..b0c694a
--- 1/src/libvirt.c
--- 2/src/libvirt.c
+++ b/src/libvirt.c
@@@ -537,9 -477,9 +560,9 @@@ lv_read (void
                  /* cpu map = */ NULL, /* cpu map length = */ 0);
          if (status < 0)
          {
 -            ERROR ("libvirt plugin: virDomainGetVcpus failed with status %i.",
 +            ERROR (PLUGIN_NAME " plugin: virDomainGetVcpus failed with status %i.",
                      status);
-             free (vinfo);
+             sfree (vinfo);
              continue;
          }