cfg.mk: fix copy-paste-o in a diagnostic

* cfg.mk (sc_space_before_open_paren): Mention cpp -fpreprocessed,
not cppi, when cpp -fpreprocessed doesn't work.
Spotted by Eric Blake.

1 files changed, 2 insertions, 1 deletions

diff --git a/cfg.mk b/cfg.mk
index 8a6adc2a9..0ce1c619c 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -279,7 +279,8 @@ sc_space_before_open_paren:
 	      { echo '$(ME): the above files lack a space-before-open-paren' \
 		  1>&2; exit 1; } || :;					\
 	  else								\
-	    echo '$(ME): skipping test $@: cppi not installed' 1>&2;	\
+	    echo '$(ME): skipping test $@: cpp -fpreprocessed does not work' \
+	      1>&2;							\
 	  fi;								\
 	else :;								\
 	fi