Use SmallString instead of SmallVector

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@98436 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/PrintPreprocessedOutput.cpp b/lib/Frontend/PrintPreprocessedOutput.cpp
index be5bb0d..44e0e13 100644
--- a/lib/Frontend/PrintPreprocessedOutput.cpp
+++ b/lib/Frontend/PrintPreprocessedOutput.cpp
@@ -61,7 +61,7 @@
   if (MI.tokens_empty() || !MI.tokens_begin()->hasLeadingSpace())
     OS << ' ';
 
-  llvm::SmallVector<char, 128> SpellingBuffer;
+  llvm::SmallString<128> SpellingBuffer;
   for (MacroInfo::tokens_iterator I = MI.tokens_begin(), E = MI.tokens_end();
        I != E; ++I) {
     if (I->hasLeadingSpace())