This patch do below things:
1) standarize code indent and style;
2) add log when message is NULL, it may be a result of vasprintf failed or disable message manually;
3) add microsecond round up check.
Bug-AGL: SPEC-2760
Change-Id: I1cac7a8f4755526c40f83aa3d6dfb3fbe0819fac Signed-off-by: Li Xiaoming <lixm.fnst@cn.fujitsu.com>