udf: fix udf_setsize() for file data in ICB

If the new size is larger than the old size and the old file data was
stored in the ICB (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) and the
new size still fits in the ICB, skip the call to udf_extend_file() as it
does not handle this i_alloc_type value (it calls BUG()).

Signed-off-by: Ian Abbott <[e-mail]>
Signed-off-by: Jan Kara <[e-mail]>

fs/udf/inode.c

···
 				if (err)
 					return err;
 				down_write(&iinfo->i_data_sem);
-			} else
+			} else {
 				iinfo->i_lenAlloc = newsize;
+				goto set_size;
+			}
 		}
 		err = udf_extend_file(inode, newsize);
 		if (err) {
 			up_write(&iinfo->i_data_sem);
 			return err;
 		}
+set_size:
 		truncate_setsize(inode, newsize);
 		up_write(&iinfo->i_data_sem);
 	} else {