Supply a default implementation of IsRuntimeSupportValue.

Thanks to Pavel for pointing this out.

llvm-svn: 359925
diff --git a/lldb/source/Core/ValueObject.cpp b/lldb/source/Core/ValueObject.cpp
index 1d9d7d4..e2b91fe 100644
--- a/lldb/source/Core/ValueObject.cpp
+++ b/lldb/source/Core/ValueObject.cpp
@@ -31,6 +31,7 @@
 #include "lldb/Symbol/Declaration.h"
 #include "lldb/Symbol/SymbolContext.h"
 #include "lldb/Symbol/Type.h"
+#include "lldb/Symbol/Variable.h"
 #include "lldb/Target/ExecutionContext.h"
 #include "lldb/Target/Language.h"
 #include "lldb/Target/LanguageRuntime.h"
@@ -1704,6 +1705,9 @@
       runtime = process->GetObjCLanguageRuntime();
     if (runtime)
       return runtime->IsRuntimeSupportValue(*this);
+    // If there is no language runtime, trust the compiler to mark all
+    // runtime support variables as artificial.
+    return GetVariable() && GetVariable()->IsArtificial();
   }
   return false;
 }