Check*CompilerFlag: Do not set result as a normal variable too
This was regressed by !5281 (merged). See #21207 (comment 981113).
Fixes: #21207 (closed)
Backport: release
Edited by Brad King
This was regressed by !5281 (merged). See #21207 (comment 981113).
Fixes: #21207 (closed)
Backport: release