Fix typo in comment: "course" -> "coarse"
Fix typo in comment: "course" -> "coarse"

Sponsored by:	FreeBSD Foundation
Submitted by:	jmallett
MFC after:	3 months
X-MFC with:	r218152

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase