Build system: enable the "df" plugin when getmntent_r() is available.

Looks like the check result used to be stored in a variable of a
different name.

diff --git a/configure.ac b/configure.ac
index c4cdf4d..438d567 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -6308,7 +6308,7 @@ then
        plugin_df="yes"
 fi
 
-if test "x$c_cv_have_getmntent_r" = "xyes"
+if test "x$have_getmntent_r" = "xyes"
 then
        plugin_df="yes"
 fi