Fix data size issue in test

Author: ru551n

vunit/vhdl/verification_components/test/tb_axi_write_slave.vhd

@@ -355,11 +355,10 @@ begin
 
     elsif run("Test unaligned write around 4kbyte boundary") then
       -- Do one beat write at unaligned address starting around 4kB boundary
-      len := 1;
       log_size := log_data_size;
-      buf := allocate(memory, 4096 - (2**log_data_size / 8) + 1, permissions => no_access); -- Unaligned address
-      random_integer_vector_ptr(rnd, data, (2**log_data_size / 8) , 0, 255);
-      buf := allocate(memory, length(data), permissions => no_access);
+      buf := allocate(memory, 4096 - 2**log_size + 1, permissions => no_access);
+      random_integer_vector_ptr(rnd, data, 2**log_size , 0, 255);
+      buf := allocate(memory, length(data), permissions => no_access); -- Unaligned address
       transfer(x"2", buf, log_size, data);
 
     elsif run("Test error on missing tlast fixed") then