disable unused parameter warning for clang

7 jobs for Fix_warnings-GF in 5 minutes and 47 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #18428
Qt551 VS2013
CoMISo-VS2013-Qt-5.5.1-x64

00:01:08

passed #18423
Linux
clang-c++11

00:05:34

passed #18425
Linux
clang-c++98

00:04:30

passed #18422
Linux
gcc-c++11

00:05:47

passed #18424
Linux
gcc-c++98

00:04:55

passed #18426
Apple
macos-c++11

00:04:46

passed #18427
Apple
macos-c++98

00:04:07