Found by clang-tidy:
```
bench/uprobe.c:98:3: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc]
                bench_uprobe_bpf__destroy(skel);
```

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/bench/uprobe.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/bench/uprobe.c b/tools/perf/bench/uprobe.c
index 914c0817fe8a..5c71fdc419dd 100644
--- a/tools/perf/bench/uprobe.c
+++ b/tools/perf/bench/uprobe.c
@@ -89,6 +89,7 @@ static int bench_uprobe__setup_bpf_skel(enum bench_uprobe bench)
 	return err;
 cleanup:
 	bench_uprobe_bpf__destroy(skel);
+	skel = NULL;
 	return err;
 }
 
-- 
2.42.0.609.gbb76f46606-goog