tests: fix memleak in error path test for input visitor

Signed-off-by: NWenchao Xia <xiawenc@linux.vnet.ibm.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Message-id: 1383676551-18806-3-git-send-email-xiawenc@linux.vnet.ibm.com
Cc: qemu-stable@nongnu.org
Signed-off-by: NAnthony Liguori <aliguori@amazon.com>
(cherry picked from commit 8aa15b6e)
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>

tests/test-qmp-input-visitor.c

@@ -604,6 +604,7 @@ static void test_visitor_in_errors(TestInputVisitorData *data,
     g_assert(error_is_set(&errp));
     g_assert(p->string == NULL);
 
+    error_free(errp);
     g_free(p->string);
     g_free(p);
 }