Revert change I didn't mean to check in.

llvm-svn: 196956
diff --git a/lldb/source/Target/ThreadPlanStepThrough.cpp b/lldb/source/Target/ThreadPlanStepThrough.cpp
index 37cd03c..18da6cd 100644
--- a/lldb/source/Target/ThreadPlanStepThrough.cpp
+++ b/lldb/source/Target/ThreadPlanStepThrough.cpp
@@ -161,7 +161,7 @@
     // First, did we hit the backstop breakpoint?
     if (HitOurBackstopBreakpoint())
     {
-        SetPlanComplete(false);
+        SetPlanComplete(true);
         return true;
     }