rpc: fix resource leak

Commit 252610f7 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: NPavel Hrdina <phrdina@redhat.com>
(cherry picked from commit ab0a461b)

src/rpc/virnetdaemon.c

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