Fix compiling problems on VS2019 with vc142 toolset

Msvc142 in VS2019 preview 2 doesn't allow std::atomic_flag to be initialized by a bool. Call test_and_set in the constructors instead.

1 files changed, 1 insertions, 1 deletions

diff --git a/Alc/alcontext.h b/Alc/alcontext.h
index 472d06ae..213949f2 100644
--- a/Alc/alcontext.h
+++ b/Alc/alcontext.h
@@ -80,7 +80,7 @@ struct ALCcontext {
     ALfloat SpeedOfSound{};
     ALfloat MetersPerUnit{1.0f};
 
-    std::atomic_flag PropsClean{true};
+    std::atomic_flag PropsClean;
     std::atomic<bool> DeferUpdates{false};
 
     std::mutex PropLock;