core/CMakeLists: Make some warnings errors

Makes our error coverage a little more consistent across the board by
applying it to Linux side of things as well. This also makes it more
consistent with the warning settings in other libraries in the project.

This also updates httplib to 0.7.9, as there are several warning
cleanups made that allow us to enable several warnings as errors.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/core/crypto/key_manager.cpp b/src/core/crypto/key_manager.cpp
index 65d246050b..da15f764a3 100644
--- a/src/core/crypto/key_manager.cpp
+++ b/src/core/crypto/key_manager.cpp
@@ -411,7 +411,7 @@ Loader::ResultStatus DeriveSDKeys(std::array<Key256, 2>& sd_keys, KeyManager& ke
     // Combine sources and seed
     for (auto& source : sd_key_sources) {
         for (std::size_t i = 0; i < source.size(); ++i) {
-            source[i] ^= sd_seed[i & 0xF];
+            source[i] = static_cast<u8>(source[i] ^ sd_seed[i & 0xF]);
         }
     }