Continue to boot even the ISO file size is invalid.

INSTALL/grub/grub.cfg

@@ -1215,9 +1215,8 @@ function iso_common_menuentry {
             echo -e "\n $vt_volume_space $vt_chosen_size $vt_chosen_size_mod\n"
             echo -e "\n The size of the iso file \"$vt_chosen_size\" is invalid. File corrupted ?\n"
             echo -e " 此ISO文件的大小 \"$vt_chosen_size\" 有问题，请确认文件是否损坏。\n"
-            echo -e "\n press ENTER to exit (请按 回车 键返回) ..."
+            echo -e "\n press ENTER to continue (请按 回车 键继续) ..."
             read vtInputKey
-            return
         fi
     fi