Use the macro for standard error return values.
Use the macro for standard error return values.

.Dd not bumped because there is no important content change.

Approved by:	bcr (mentor)
MFC after:	3 days
Obtained from:	DragonflyBSD

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