fixup comment about loop

Signed-off-by: mwish <[email protected]>

src/hyperloglog.c

@@ -470,7 +470,7 @@ int hllPatLen(unsigned char *ele, size_t elesize, long *regp) {
     hash = MurmurHash64A(ele, elesize, 0xadc83b19ULL);
     index = hash & HLL_P_MASK;      /* Register index. */
     hash >>= HLL_P;                 /* Remove bits used to address the register. */
-    hash |= ((uint64_t)1 << HLL_Q); /* Make sure the loop terminates
+    hash |= ((uint64_t)1 << HLL_Q); /* Make sure ctz will not get undefined results
                                        and count will be <= Q+1. */
     /* Initialized to 1 since we count the "00000...1" pattern. */
     count = 1 + __builtin_ctzll(hash);