Fix sa2u() regression.

Take large_pad into account when determining whether an aligned
allocation can be satisfied by a large size class.

This regression was introduced by
8a03cf039c (Implement cache index
randomization for large allocations.).

include/jemalloc/internal/jemalloc_internal.h.in

@@ -708,7 +708,7 @@ sa2u(size_t size, size_t alignment)
 		 * Calculate the size of the over-size run that arena_palloc()
 		 * would need to allocate in order to guarantee the alignment.
 		 */
-		if (usize + alignment - PAGE <= arena_maxrun)
+		if (usize + large_pad + alignment - PAGE <= arena_maxrun)
 			return (usize);
 	}