Fix clang complain

5 jobs for v1.6.0-Darwin in 8 minutes and 29 seconds (queued for 4 seconds)
latest
Status Job ID Name Coverage
  Build Testinstall
passed #300130
dailyBuildMasterAll

00:03:00

 
  Doc Coverage
passed #300135
Doc

00:03:18

passed #300132
TestCoverage

00:02:11

80.0%
 
  Deploy
passed #300137
pages

00:00:20

passed pages:deploy

00:01:23