Fix Galaktos plugin compilation, config.h related.

modules/visualization/galaktos/plugin.h

@@ -24,6 +24,10 @@
 #ifndef _GALAKTOS_PLUGIN_H_
 #define _GALAKTOS_PLUGIN_H_
 
+#ifdef HAVE_CONFIG_H
+ #include "config.h"
+#endif
+
 #include <vlc/vlc.h>
 #include <vlc_aout.h>
 #include <vlc_vout.h>