Fix updating of available (V)CPUs in CStats

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Balazs Lecz <leczb@google.com>

Ganeti/HTools/Cluster.hs

@@ -179,15 +179,16 @@ updateCStats cs node =
         inc_icpu = Node.uCpu node
         inc_idsk = truncate (Node.tDsk node) - Node.fDsk node
         inc_vcpu = Node.hiCpu node
+        inc_acpu = Node.availCpu node
 
     in cs { csFmem = x_fmem + Node.fMem node
           , csFdsk = x_fdsk + Node.fDsk node
           , csAmem = x_amem + inc_amem'
           , csAdsk = x_adsk + inc_adsk
-          , csAcpu = x_acpu
+          , csAcpu = x_acpu + inc_acpu
           , csMmem = max x_mmem inc_amem'
           , csMdsk = max x_mdsk inc_adsk
-          , csMcpu = x_mcpu
+          , csMcpu = max x_mcpu inc_acpu
           , csImem = x_imem + inc_imem
           , csIdsk = x_idsk + inc_idsk
           , csIcpu = x_icpu + inc_icpu