pw_kvs: Fix printf-style format strings
Fix a few variables so they don't assume the underlying type of
uint32_t.
Change-Id: I3e78c82898ecda7a04e4ba31da46bb3b299db5be
diff --git a/pw_kvs/flash_partition_with_stats.cc b/pw_kvs/flash_partition_with_stats.cc
index f966756..7c9531d 100644
--- a/pw_kvs/flash_partition_with_stats.cc
+++ b/pw_kvs/flash_partition_with_stats.cc
@@ -54,7 +54,7 @@
std::fprintf(out_file,
",%zu,%u,%zu",
utilization_percentage,
- kvs.transaction_count(),
+ unsigned(kvs.transaction_count()),
kvs.size());
for (size_t counter : sector_erase_counters()) {