Cleanup nonce changes

src/crypto/verus_hash.h

@@ -27,7 +27,7 @@ class CVerusHash
 
         static void init();
 
-        CVerusHash() {}
+        CVerusHash() { }
 
         CVerusHash &Write(const unsigned char *data, size_t len);
 
@@ -37,6 +37,7 @@ class CVerusHash
             result = buf2;
             curPos = 0;
             std::fill(buf1, buf1 + sizeof(buf1), 0);
+            return *this;
         }
 
         int64_t *ExtraI64Ptr() { return (int64_t *)(curBuf + 32); }