perf annotate: Fix memory leak in annotated_source

Freeing hash map doesn't free the entries added to the hashmap, add
the missing free().

Fixes: d3e7cad6f36d9e80 ("perf annotate: Add a hashmap for symbol histogram")
Signed-off-by: Ian Rogers <[e-mail]>
Cc: Adrian Hunter <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Andi Kleen <[e-mail]>
Cc: Athira Rajeev <[e-mail]>
Cc: Ben Gainey <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: James Clark <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Kajol Jain <[e-mail]>
Cc: Kan Liang <[e-mail]>
Cc: K Prateek Nayak <[e-mail]>
Cc: Li Dong <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Oliver Upton <[e-mail]>
Cc: Paran Lee <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Ravi Bangoria <[e-mail]>
Cc: Sun Haiyong <[e-mail]>
Cc: Tim Chen <[e-mail]>
Cc: Yanteng Si <[e-mail]>
Cc: Yicong Yang <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/util/annotate.c

···
 
 static __maybe_unused void annotated_source__delete(struct annotated_source *src)
 {
+	struct hashmap_entry *cur;
+	size_t bkt;
+
 	if (src == NULL)
 		return;
+
+	hashmap__for_each_entry(src->samples, cur, bkt)
+		zfree(&cur->pvalue);
 
 	hashmap__free(src->samples);
 	zfree(&src->histograms);