target/s390x: fix pgm irq ilen in translate_pages()

0 is certainly wrong. Let's use ILEN_AUTO.
Signed-off-by: NDavid Hildenbrand <david@redhat.com>
Message-Id: <20170721125609.11117-3-david@redhat.com>
Reviewed-by: NThomas Huth <thuth@redhat.com>
Signed-off-by: NCornelia Huck <cohuck@redhat.com>

target/s390x/mmu_helper.c

@@ -440,7 +440,7 @@ static int translate_pages(S390CPU *cpu, vaddr addr, int nr_pages,
         }
         if (!address_space_access_valid(&address_space_memory, pages[i],
                                         TARGET_PAGE_SIZE, is_write)) {
-            program_interrupt(env, PGM_ADDRESSING, 0);
+            program_interrupt(env, PGM_ADDRESSING, ILEN_AUTO);
             return -EFAULT;
         }
         addr += TARGET_PAGE_SIZE;