6786163 read the 0 length message should return success instead of EWOULDBLOCK

[mike.ch...@sun.com]

Author: Mike Cheng <Mike.Cheng at Sun.COM>
Repository: /hg/onnv/onnv-gate
Latest revision: 9e14f978357d333c5f0c594954d6d000367a0b46
Total changesets: 1
Log message:
6786163 read the 0 length message should return success instead of EWOULDBLOCK

Files:
        update: usr/src/uts/common/fs/sockfs/sockcommon_subr.c