[client] wayland: fail gracefully when interfaces are too old

Before, we just attempt to bind, causing an obscure Wayland error.
This commit checks the interface versions and print better error
messages.

client/displayservers/Wayland/window.c

@@ -139,7 +139,7 @@ bool waylandWindowInit(const char * title, bool fullscreen, bool maximize, bool
 
   if (!wlWm.compositor)
   {
-    DEBUG_ERROR("Compositor missing wl_compositor, will not proceed");
+    DEBUG_ERROR("Compositor missing wl_compositor (version 4+), will not proceed");
     return false;
   }