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.

2 files changed, 2 insertions, 1 deletions

diff --git a/Alc/alc.cpp b/Alc/alc.cpp
index d05d1431..425af2da 100644
--- a/Alc/alc.cpp
+++ b/Alc/alc.cpp
@@ -2312,6 +2312,7 @@ static DeviceRef VerifyDevice(ALCdevice *device)
 
 ALCcontext::ALCcontext(ALCdevice *device) : Device{device}
 {
+    PropsClean.test_and_set();
 }
 
 /* InitContext
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;