fixup! Background house-keeping & pre-existing thread

Author: vlovich

tcmalloc/malloc_extension.cc

@@ -443,8 +443,7 @@ void MallocExtension::ProcessBackgroundActionsTick() {
 
 bool MallocExtension::NeedsProcessBackgroundActions() {
 #if ABSL_INTERNAL_HAVE_WEAK_MALLOCEXTENSION_STUBS
-  static bool needed = &MallocExtension_Internal_ProcessBackgroundActions != nullptr;
-  return needed;
+  return &MallocExtension_Internal_ProcessBackgroundActions != nullptr;
 #else
   return false;
 #endif