Add test for an empty definition.

Happily this one passes without needing any additional code.

diff --git a/tests/008-define-empty.c b/tests/008-define-empty.c
new file mode 100644 (file)
index 0000000..b1bd17e
--- /dev/null
+++ b/tests/008-define-empty.c
@@ -0,0 +1,2 @@
+#define foo
+foo