Make Options::SetOptionValue take a StringRef.

llvm-svn: 286723
diff --git a/lldb/source/Interpreter/Options.cpp b/lldb/source/Interpreter/Options.cpp
index 3473c20..c95876f 100644
--- a/lldb/source/Interpreter/Options.cpp
+++ b/lldb/source/Interpreter/Options.cpp
@@ -905,7 +905,7 @@
 }
 
 Error OptionGroupOptions::SetOptionValue(uint32_t option_idx,
-                                         const char *option_value,
+                                         llvm::StringRef option_value,
                                          ExecutionContext *execution_context) {
   // After calling OptionGroupOptions::Append(...), you must finalize the groups
   // by calling OptionGroupOptions::Finlize()
@@ -913,8 +913,8 @@
   Error error;
   if (option_idx < m_option_infos.size()) {
     error = m_option_infos[option_idx].option_group->SetOptionValue(
-        m_option_infos[option_idx].option_index,
-        llvm::StringRef::withNullAsEmpty(option_value), execution_context);
+        m_option_infos[option_idx].option_index, option_value,
+        execution_context);
 
   } else {
     error.SetErrorString("invalid option index"); // Shouldn't happen...