[Preprocessor/CodeComplete] Don't add include guard macros to code-completion results.

llvm-svn: 205917
diff --git a/clang/lib/Lex/MacroInfo.cpp b/clang/lib/Lex/MacroInfo.cpp
index 0325a80..8547ad3 100644
--- a/clang/lib/Lex/MacroInfo.cpp
+++ b/clang/lib/Lex/MacroInfo.cpp
@@ -29,7 +29,8 @@
     IsUsed(false),
     IsAllowRedefinitionsWithoutWarning(false),
     IsWarnIfUnused(false),
-    FromASTFile(false) {
+    FromASTFile(false),
+    UsedForHeaderGuard(false) {
 }
 
 unsigned MacroInfo::getDefinitionLengthSlow(SourceManager &SM) const {