usual.m4: -Wextra check uses wrong variable

diff --git a/m4/usual.m4 b/m4/usual.m4
index 7fb894cb113fd17bf277dafe0e5cf7510ca294f8..576c2f9d57b10daa50bf00daf8f56a901e8f1eee 100644 (file)
--- a/m4/usual.m4
+++ b/m4/usual.m4
@@ -82,7 +82,7 @@ if test x"$GCC" = xyes; then
   done
 
   # avoid -Wextra if missing-field.initializers does not work
-  echo "$warnings" | grep missing-field-initializers > /dev/null \
+  echo "$WFLAGS" | grep missing-field-initializers > /dev/null \
   || WFLAGS=`echo "$WFLAGS"|sed 's/ -Wextra//'`
 
   CFLAGS="$good_CFLAGS"