envy24control: fix GtkSpinButton runtime warnings

alsa-project/alsa-tools pull request #31 was opened from andreas56:

Change the parameters to gtk_adjustment_new to get rid of this runtime warning from GTK:

GtkSpinButton: setting an adjustment with non-zero page size is deprecated

The change is also important when envy24control is ported to GTK 3, as the spin buttons will stop working if it's not done.

Request URL : https://github.com/alsa-project/alsa-tools/pull/31 Patch URL : https://github.com/alsa-project/alsa-tools/pull/31.patch Repository URL: https://github.com/alsa-project/alsa-tools