tests: use 'test_must_be_empty' instead of 'test_cmp <empty> <out>'

diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
index 49fc15e1c14ccaee280f9da46c011d976ac33405..920678a14b8ce28c50b5769fcf0bba022798b6ae 100755 (executable)
--- a/GIT-VERSION-GEN
+++ b/GIT-VERSION-GEN
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 GVF=GIT-VERSION-FILE
-DEF_VER=v2.18.0-rc2
+DEF_VER=v2.18.GIT
 
 LF='
 '