Add a couple more test cases to the suite.

They handle cases where there is no attached patch.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/t/t5100/msg0008 b/t/t5100/msg0008
new file mode 100644
index 0000000..a80ecb9
--- /dev/null
+++ b/t/t5100/msg0008
@@ -0,0 +1,4 @@
+>Here is an empty patch from A U Thor.
+
+Hey you forgot the patch!
+