added return value for comedi_apply_calibration()

diff --git a/doc/funcref b/doc/funcref
index 545a068cb3ec4f157945ddf1a5f66d59927aae8c..612bcc93983408636725ef56bc9557ce49a1cd12 100644 (file)
--- a/doc/funcref
+++ b/doc/funcref
@@ -850,4 +850,6 @@ Description:
  If file_path is NULL, then comedilib will use its the default
  file location.  The calibration information used by this function
  is generated by the comedi_calibrate program (see its man page).
+Returns:
+ Zero on success, a negative number on failure.