xwayland/eglstream: Fix order of `calloc()` args

The definition by the manual is `calloc(size_t nmemb, size_t size)`.

Swap the arguments of calloc() calls to match the definition.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>

hw/xwayland/xwayland-glamor-eglstream.c

@@ -910,7 +910,7 @@ xwl_glamor_init_eglstream(struct xwl_screen *xwl_screen)
     if (!dixRegisterPrivateKey(&xwl_eglstream_private_key, PRIVATE_SCREEN, 0))
         return;
 
-    xwl_eglstream = calloc(sizeof(*xwl_eglstream), 1);
+    xwl_eglstream = calloc(1, sizeof(*xwl_eglstream));
     if (!xwl_eglstream) {
         ErrorF("Failed to allocate memory required to init EGLStream support\n");
         return;