Coding Implementation doesn't correspond to the design

[Al Wei]

When I'm looking through the recovery processing, I find one problem in master 
branch:
An empty file'll have a field "crashed" that is assigned "true" in 
org.apache.iotdb.tsfile.write.writer.RestorableTsFileIOWriter#RestorableTsFileIOWriter.
 However, according to the design docs, an empty file will have a field 
"crashed" that is assigned "false".
Does this affect something?
related jira issue IOTDB-1042