Placate some compiler errors on CHERI

src/backend/pagemap.h

@@ -294,7 +294,7 @@ namespace snmalloc
     void set(address_t p, T t)
     {
 #ifdef SNMALLOC_TRACING
-      std::cout << "Pagemap.Set " << (void*)p << std::endl;
+      std::cout << "Pagemap.Set " << (void*)(uintptr_t)p << std::endl;
 #endif
       if constexpr (has_bounds)
       {

src/mem/metaslab.h

@@ -283,7 +283,10 @@ namespace snmalloc
 
     [[nodiscard]] SNMALLOC_FAST_PATH sizeclass_t get_sizeclass() const
     {
-      return remote_and_sizeclass & (alignof(RemoteAllocator) - 1);
+      // TODO: perhaps remove static_cast with resolution of
+      // https://github.com/CTSRD-CHERI/llvm-project/issues/588
+      return static_cast<sizeclass_t>(remote_and_sizeclass) &
+        (alignof(RemoteAllocator) - 1);
     }
   };