Simplify condition (NFC)

Author: adrian-prantl

lldb/source/Expression/UserExpression.cpp

@@ -242,7 +242,7 @@ UserExpression::Evaluate(ExecutionContext &exe_ctx,
   // If the language was not specified in the expression command, set it to the
   // language in the target's properties if specified, else default to the
   // langage for the frame.
-  if (!language.name) {
+  if (!language) {
     if (target->GetLanguage() != lldb::eLanguageTypeUnknown)
       language = target->GetLanguage();
     else if (StackFrame *frame = exe_ctx.GetFramePtr())