Improve verbose

Now with -1, the CSDS prints only information about the time taken.

src/csds_hashmap.h

@@ -172,9 +172,8 @@ static uint64_t SIP64(const id_type *key) {
     SIPROUND;
     v0 ^= m;
   }
-  const int left = inlen & 7;
   uint64_t b = ((uint64_t)inlen) << 56;
-  switch (left) {
+  switch (inlen & 7) {
     case 7:
       b |= ((uint64_t)in[6]) << 48;
       break;