Simplify.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102432 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index db5f92d..c407d8c 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -1258,10 +1258,8 @@
 
   // -fshort-wchar default varies depending on platform; only
   // pass if specified.
-  if (Arg *A = Args.getLastArg(options::OPT_fshort_wchar)) {
-    if (A->getOption().matches(options::OPT_fshort_wchar))
-      CmdArgs.push_back("-fshort-wchar");
-  }
+  if (Arg *A = Args.getLastArg(options::OPT_fshort_wchar))
+    A->render(Args, CmdArgs);
 
   // -fno-pascal-strings is default, only pass non-default. If the tool chain
   // happened to translate to -mpascal-strings, we want to back translate here.