Makefile: check for waf before clean

diff --git a/Makefile b/Makefile
index 410d75c..0bf1925 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -136,7 +136,7 @@ check_clean_python:
        make clean_python
        make clean_python
 
-clean:
+clean: checkwaf
        # optionnaly clean before build
        -$(WAFCMD) clean