CTest: Parse empty Git commits correctly

Git's diff-tree format has no '\n'-terminated blank line at the end of
its commit message body block if there are no diff lines.  Instead the
message body is terminated by '\0' and there is no diff section.  Teach
CTest to parse the format in this case.

1 files changed, 1 insertions, 0 deletions

diff --git a/Source/cmProcessTools.h b/Source/cmProcessTools.h
index 0b210af..439726d 100644
--- a/Source/cmProcessTools.h
+++ b/Source/cmProcessTools.h
@@ -55,6 +55,7 @@ public:
     bool IgnoreCR;
     std::ostream* Log;
     const char* Prefix;
+    char LineEnd;
     std::string Line;
     virtual bool ProcessChunk(const char* data, int length);