Merge branch 'jh/trace2'

A few embarrassing bugfixes.

* jh/trace2:
  trace2: fix up a missing "leave" entry point
  trace2: fix incorrect function pointer check

read-cache.c

@@ -3131,7 +3131,7 @@ static int write_shared_index(struct index_state *istate,
 	trace2_region_enter_printf("index", "shared/do_write_index",
 				   the_repository, "%s", (*temp)->filename.buf);
 	ret = do_write_index(si->base, *temp, 1);
-	trace2_region_enter_printf("index", "shared/do_write_index",
+	trace2_region_leave_printf("index", "shared/do_write_index",
 				   the_repository, "%s", (*temp)->filename.buf);
 
 	if (ret)

trace2.c

@@ -734,7 +734,7 @@ void trace2_data_json_fl(const char *file, int line, const char *category,
 	us_elapsed_region = tr2tls_region_elasped_self(us_now);
 
 	for_each_wanted_builtin (j, tgt_j)
-		if (tgt_j->pfn_data_fl)
+		if (tgt_j->pfn_data_json_fl)
 			tgt_j->pfn_data_json_fl(file, line, us_elapsed_absolute,
 						us_elapsed_region, category,
 						repo, key, value);