Fix class/struct mismatch.
libc++ has switched this from a class to a struct to match libstdc++.
The standard does not require either specifically, but Clang warns
about the mismatch: https://bugs.llvm.org/show_bug.cgi?id=39871.
Test: m
Bug: None
Exempt-From-Owner-Approval: Janitorial
Change-Id: Iffbd944f60eb363ef7cd8f9f2c2eea77ff967310
diff --git a/keystore/KeyStore.h b/keystore/KeyStore.h
index 25ff3a5..69a02ae 100644
--- a/keystore/KeyStore.h
+++ b/keystore/KeyStore.h
@@ -62,7 +62,7 @@
} // namespace keystore
namespace std {
-template <typename T, size_t count> class tuple_size<keystore::Devices<T, count>> {
+template <typename T, size_t count> struct tuple_size<keystore::Devices<T, count>> {
public:
static constexpr size_t value = std::tuple_size<std::array<T, count>>::value;
};