use st_add and st_mult for allocation size computation

diff --git a/khash.h b/khash.h
index 376475a5eaf80585311ab518d03c229a7a49a7ed..c0da40daa78f703f825208bb7d1b4b5b3cc05ae3 100644 (file)
--- a/khash.h
+++ b/khash.h
@@ -117,7 +117,7 @@ static const double __ac_HASH_UPPER = 0.77;
                        if (new_n_buckets < 4) new_n_buckets = 4;                                       \
                        if (h->size >= (khint_t)(new_n_buckets * __ac_HASH_UPPER + 0.5)) j = 0; /* requested size is too small */ \
                        else { /* hash table size to be changed (shrink or expand); rehash */ \
-                               new_flags = (khint32_t*)xmalloc(__ac_fsize(new_n_buckets) * sizeof(khint32_t)); \
+                               ALLOC_ARRAY(new_flags, __ac_fsize(new_n_buckets)); \
                                if (!new_flags) return -1;                                                              \
                                memset(new_flags, 0xaa, __ac_fsize(new_n_buckets) * sizeof(khint32_t)); \
                                if (h->n_buckets < new_n_buckets) {     /* expand */            \