vcruntime140: Add __uncaught_exceptions implementation.

dlls/vcruntime140/Makefile.in

 MODULE    = vcruntime140.dll
+IMPORTS   = ucrtbase
 
 C_SRCS = \
 	misc.c

dlls/vcruntime140/misc.c

@@ -22,6 +22,8 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(vcruntime);
 
+int* CDECL __processing_throw(void);
+
 /*********************************************************************
  *              __telemetry_main_invoke_trigger
  */
@@ -47,3 +49,8 @@ BOOL CDECL __vcrt_InitializeCriticalSectionEx(
     TRACE("(%p %x %x)\n", cs, spin_count, flags);
     return InitializeCriticalSectionEx(cs, spin_count, flags);
 }
+
+int __cdecl __uncaught_exceptions(void)
+{
+    return *__processing_throw();
+}

dlls/vcruntime140/vcruntime140.spec

@@ -48,7 +48,7 @@
 @ cdecl __unDName(ptr str long ptr ptr long) ucrtbase.__unDName
 @ cdecl __unDNameEx(ptr str long ptr ptr ptr long) ucrtbase.__unDNameEx
 @ cdecl __uncaught_exception() ucrtbase.__uncaught_exception
-@ stub __uncaught_exceptions
+@ cdecl __uncaught_exceptions()
 @ stub __vcrt_GetModuleFileNameW
 @ stub __vcrt_GetModuleHandleW
 @ cdecl __vcrt_InitializeCriticalSectionEx(ptr long long)