build: remove constexpr for gcc9

aee805d4 · Andreas Rauschert · fc0e0e51 · aee805d4
Commit aee805d4 authored 4 months ago by Andreas Rauschert
--- a/engine/src/Storyboard/ByEntityCondition/TimeHeadwayCondition_impl.cpp
+++ b/engine/src/Storyboard/ByEntityCondition/TimeHeadwayCondition_impl.cpp
@@ -20,7 +20,7 @@ namespace OpenScenarioEngine::v1_3
 namespace detail
 {
 // Normalize angle to [-π, π] range
-constexpr units::angle::radian_t NormalizeAngle(units::angle::radian_t angle) noexcept
+units::angle::radian_t NormalizeAngle(units::angle::radian_t angle) noexcept
 {
  constexpr auto pi = units::angle::radian_t{M_PI};
  constexpr auto two_pi = 2.0 * pi;