EditedSource.cpp: Appease msvc, to add <cctype>.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170817 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Edit/EditedSource.cpp b/lib/Edit/EditedSource.cpp
index 139a01f..4b7af24 100644
--- a/lib/Edit/EditedSource.cpp
+++ b/lib/Edit/EditedSource.cpp
@@ -14,6 +14,7 @@
 #include "clang/Lex/Lexer.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/Twine.h"
+#include <cctype>
 
 using namespace clang;
 using namespace edit;