simplified uint_to_hash

Author: flexatone

arraymap.c

@@ -149,7 +149,7 @@ char_get_end_p(char* p, Py_ssize_t dt_size) {
 static inline Py_hash_t
 uint_to_hash(npy_uint64 v) {
     Py_hash_t hash = (Py_hash_t)(v & INT64_MAX);
-    if (v & 1ull << 63) {
+    if (v >> 63) {
         hash = -hash;
         if (hash == -1) {
             return -2;