validationcaches: Use size_t for sizes

...also move the 0-clamping logic to ApplyArgsManOptions, where it
   belongs.

2 files changed, 3 insertions, 7 deletions

diff --git a/src/script/sigcache.cpp b/src/script/sigcache.cpp
index 8e6971d3f3..e507ec7528 100644
--- a/src/script/sigcache.cpp
+++ b/src/script/sigcache.cpp
@@ -93,13 +93,9 @@ static CSignatureCache signatureCache;
 
 // To be called once in AppInitMain/BasicTestingSetup to initialize the
 // signatureCache.
-bool InitSignatureCache(int64_t max_size_bytes)
+bool InitSignatureCache(size_t max_size_bytes)
 {
-    // nMaxCacheSize is unsigned. If -maxsigcachesize is set to zero,
-    // setup_bytes creates the minimum possible cache (2 elements).
-    size_t nMaxCacheSize = std::max<int64_t>(max_size_bytes, 0);
-
-    auto setup_results = signatureCache.setup_bytes(nMaxCacheSize);
+    auto setup_results = signatureCache.setup_bytes(max_size_bytes);
     if (!setup_results) return false;
 
     const auto [num_elems, approx_size_bytes] = *setup_results;
diff --git a/src/script/sigcache.h b/src/script/sigcache.h
index 4c1cad38a7..290955090d 100644
--- a/src/script/sigcache.h
+++ b/src/script/sigcache.h
@@ -32,6 +32,6 @@ public:
     bool VerifySchnorrSignature(Span<const unsigned char> sig, const XOnlyPubKey& pubkey, const uint256& sighash) const override;
 };
 
-[[nodiscard]] bool InitSignatureCache(int64_t max_size_bytes);
+[[nodiscard]] bool InitSignatureCache(size_t max_size_bytes);
 
 #endif // BITCOIN_SCRIPT_SIGCACHE_H