[lldb][dap] always add column field in StackFrame body (llvm#73393)

The `column` field is mandatory in StackTraceResponse, otherwise the
debugger client may raise error (e.g. VSCode can't correctly open an
editor without the column field)

---------

Signed-off-by: Xu Jun <[email protected]>
(cherry picked from commit 99f42e6)

Author: xujuntwt95329

lldb/tools/lldb-dap/JSONUtils.cpp

@@ -813,9 +813,10 @@ llvm::json::Value CreateStackFrame(lldb::SBFrame &frame) {
     auto line = line_entry.GetLine();
     if (line && line != LLDB_INVALID_LINE_NUMBER)
       object.try_emplace("line", line);
+    else
+      object.try_emplace("line", 0);
     auto column = line_entry.GetColumn();
-    if (column && column != LLDB_INVALID_COLUMN_NUMBER)
-      object.try_emplace("column", column);
+    object.try_emplace("column", column);
   } else {
     object.try_emplace("line", 0);
     object.try_emplace("column", 0);