configure: fix VDA warning on systems other than OSX

CONFIG_VDA is supposed to be defined to 0 or 1. But on non-OSX systems,
the configure test isn't run at all, so CONFIG_VDA ends up undefined.

1 files changed, 1 insertions, 0 deletions

diff --git a/configure b/configure
index 95da109f4f..64cb7ea7ac 100755
--- a/configure
+++ b/configure
@@ -2819,6 +2819,7 @@ else
 fi
 echores "$libpostproc"
 
+def_vda='#define CONFIG_VDA 0'
 
 if darwin ; then