perf annotate-data: Skip sample histogram for stack canary

It's a pseudo data type and has no field.

Fixes: b3c95109 ("perf annotate-data: Add stack canary type")
Closes: https://lore.kernel.org/lkml/Zhb6jJneP36Z-or0@x1Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240411033256.2099646-2-namhyung@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/annotate.c

@@ -2399,8 +2399,9 @@ struct annotated_data_type *hist_entry__get_data_type(struct hist_entry *he)
 		mem_type = find_data_type(&dloc);
 
 		if (mem_type == NULL && is_stack_canary(arch, op_loc)) {
-			mem_type = &canary_type;
-			dloc.type_offset = 0;
+			istat->good++;
+			he->mem_type_off = 0;
+			return &canary_type;
 		}
 
 		if (mem_type)