Re-add init

Author: davschneller

interfaces/cuda/Control.cu

@@ -22,7 +22,7 @@
 namespace {
 // `static` is a bit out of place here; but we treat the whole class as an effective singleton anyways
 
-thread_local int currentDeviceId;
+thread_local int currentDeviceId = 0;
 }
 
 using namespace device;

interfaces/hip/Control.cpp

@@ -22,7 +22,7 @@
 using namespace device;
 
 namespace {
-thread_local int currentDeviceId;
+thread_local int currentDeviceId = 0;
 }
 
 ConcreteAPI::ConcreteAPI() {

interfaces/sycl/Control.cpp

@@ -12,7 +12,7 @@
 #include <thread>
 
 namespace {
-thread_local int currentDeviceId;
+thread_local int currentDeviceId = 0;
 }
 
 using namespace device;