remove pointless if from vl.c

We already set sockets to nonzero in the code above.
So this if statement always evaluates true.  Remove it.
Signed-off-by: NJoel Schopp <jschopp@austin.ibm.com>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

vl.c

@@ -801,9 +801,7 @@ static void smp_parse(const char *optarg)
             threads = threads > 0 ? threads : 1;
             cores = smp / (sockets * threads);
         } else {
-            if (sockets) {
-                threads = smp / (cores * sockets);
-            }
+            threads = smp / (cores * sockets);
         }
     }
     smp_cpus = smp;