Added support for breakpoint conditions.  I also had to separate the "run the expression" part of ClangFunction::Execute from the "Gather the expression result" so that in the case of the Breakpoint condition I can move the condition evaluation into the normal thread plan processing.

Also added support for remembering the "last set breakpoint" so that "break modify" will act on the last set breakpoint.

git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@116542 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Expression/ClangExpressionParser.cpp b/source/Expression/ClangExpressionParser.cpp
index 7085f40..506f2f5 100644
--- a/source/Expression/ClangExpressionParser.cpp
+++ b/source/Expression/ClangExpressionParser.cpp
@@ -447,7 +447,7 @@
             return err;
         }
         
-        if (m_expr.NeedsValidation())
+        if (m_expr.NeedsValidation() && exe_ctx.process->GetDynamicCheckers())
         {
             /* 
              Disabled temporarily - TODO Centralize and re-enable this inside Process to avoid race conditions