Handle the case when a variable is only valid in part of the enclosing scope

DWARF stores this information in the DW_AT_start_scope attribute. This
CL add support for this attribute and also changes the functions
displaying frame variables to only display the variables currently in
scope.

Differential revision: http://reviews.llvm.org/D17449

llvm-svn: 261858

lldb/source/API/SBBlock.cpp

@@ -131,7 +131,11 @@ SBBlock::AppendVariables (bool can_create, bool get_parent_variables, lldb_priva
     if (IsValid())
     {
         bool show_inline = true;
-        m_opaque_ptr->AppendVariables (can_create, get_parent_variables, show_inline, var_list);
+        m_opaque_ptr->AppendVariables (can_create,
+                                       get_parent_variables,
+                                       show_inline,
+                                       [](Variable*) { return true; },
+                                       var_list);
     }
 }