Add missing standard headers. Patch by Joerg Sonnenberger!
llvm-svn: 122193
diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
index c75dfcf..7b6b843 100644
--- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -27,6 +27,7 @@
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/Program.h"
+#include <cctype>
using namespace llvm;
/// These are manifest constants used by the bitcode writer. They do not need to