BV OLED: only test OLED screen in debug mode

lib/busvoodoo_oled.c

@@ -338,7 +338,9 @@ void busvoodoo_oled_setup(void)
 	busvoodoo_oled_clear(); // clean display buffer
 	busvoodoo_oled_present = oled_ssd1306_setup(); // setup OLED display
 	if (busvoodoo_oled_present) {
+#if DEBUG
 		oled_ssd1306_test(); // test OLED display
+#endif
 		busvoodoo_oled_update(); // send display buffer
 	};
 }