cmake HAVE_CONVERSION examples

mysql/mysql-router ext/protobuf/CMakeLists.txt :80 

CHECK_CXX_COMPILER_FLAG("-Wconversion" HAVE_CONVERSION)

mysql/mysql-router ext/yassl/CMakeLists.txt :78 

CHECK_CXX_COMPILER_FLAG("-Wconversion" HAVE_CONVERSION)

mysql/mysql-router src/mock_server/src/CMakeLists.txt :53 

check_cxx_compiler_flag("-Wconversion" HAVE_CONVERSION)

mysql/mysql-router src/plugin_info/CMakeLists.txt :38 

check_cxx_compiler_flag("-Wconversion" HAVE_CONVERSION)

mysql/mysql-router src/plugin_info/tests/CMakeLists.txt :40 

check_cxx_compiler_flag("-Wconversion" HAVE_CONVERSION)