rpc: fix resource leak

Commit 252610f7dd switched to use hash to store servers.
Function virHashGetItems returns allocated array which needs
to be freed also for successful path, not only if there is
an error.

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
(cherry picked from commit ab0a461b8c)

src/rpc/virnetdaemon.c

@@ -401,6 +401,7 @@ virNetDaemonPreExecRestart(virNetDaemonPtr dmn)
         }
     }
 
+    VIR_FREE(srvArray);
     virObjectUnlock(dmn);
 
     return object;