Avoid crashes in ddraw.dll when loading it without x11drv, for

dlls/ddraw/d3ddevice/mesa.c

@@ -4212,6 +4212,12 @@ d3ddevice_init_at_startup(void *gl_handle)
     int major, minor, patch, num_parsed;
     
     TRACE("Initializing GL...\n");
+
+    if (!drawable)
+    {
+        WARN("x11drv not loaded - D3D support disabled!\n");
+        return FALSE;
+    }
     
     /* Get a default rendering context to have the 'caps' function query some info from GL */    
     device_context = GetDC(0);

dlls/ddraw/ddraw/hal.c

@@ -213,6 +213,9 @@ static BOOL initialize(void)
 static void cleanup(void)
 {
     DDHAL_DESTROYDRIVERDATA data;
+
+    if (!dd_cbs.HALDD.DestroyDriver) return;
+
     data.lpDD = NULL;
     data.ddRVal = 0;
     data.DestroyDriver = dd_cbs.HALDD.DestroyDriver;