Correctly format macro with unfinished template declaration.

We can now format:
  #define A template <typename T>

Before this created a segfault :-/.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175533 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Format/TokenAnnotator.cpp b/lib/Format/TokenAnnotator.cpp
index bb2e04b..d9368c3 100644
--- a/lib/Format/TokenAnnotator.cpp
+++ b/lib/Format/TokenAnnotator.cpp
@@ -293,7 +293,8 @@
       next();
       if (!parseAngle())
         return false;
-      CurrentToken->Parent->ClosesTemplateDeclaration = true;
+      if (CurrentToken != NULL)
+        CurrentToken->Parent->ClosesTemplateDeclaration = true;
       return true;
     }
     return false;