small cleanup for random utils

Author: dankmeme01

loader/include/Geode/utils/random.hpp

@@ -82,9 +82,9 @@ namespace geode::utils::random {
     }
 
     template <typename Cont>
-    void shuffle(Cont& vec) {
+    void shuffle(Cont& cont) {
         using std::begin, std::end;
-        shuffle(begin(vec), end(vec));
+        shuffle(begin(cont), end(cont));
     }
 
     GEODE_DLL std::string generateString(size_t length, std::string_view alphabet);

loader/src/utils/random.cpp

@@ -75,9 +75,10 @@ void fillBytes(void* buffer, size_t size) {
         buf += 8;
         size -= 8;
     }
-
-    for (size_t i = 0; i < size; i++) {
-        buf[i] = generate<uint8_t>();
+    
+    if (size > 0) {
+        uint64_t val = nextU64();
+        std::memcpy(buf, &val, size);
     }
 }