fbd-dev-led: Allow to lookup color

This allows us to make the led structure into an opaque in
the next commit

src/fbd-dev-led.c

@@ -165,3 +165,10 @@ fbd_dev_led_start_periodic (FbdDevLed           *led,
 
   return success;
 }
+
+
+gboolean
+fbd_dev_led_has_color (FbdDevLed *led, FbdFeedbackLedColor color)
+{
+  return (led->color == FBD_FEEDBACK_LED_COLOR_RGB || led->color == color);
+}

src/fbd-dev-led.h

@@ -33,5 +33,6 @@ gboolean            fbd_dev_led_start_periodic (FbdDevLed           *led,
                                                 FbdFeedbackLedColor  color,
                                                 guint                max_brightness_percentage,
                                                 guint                freq);
+gboolean            fbd_dev_led_has_color (FbdDevLed *led, FbdFeedbackLedColor color);
 
 G_END_DECLS

src/fbd-dev-leds.c

@@ -46,7 +46,7 @@ find_led_by_color (FbdDevLeds *self, FbdFeedbackLedColor color)
 
   for (GSList *l = self->leds; l != NULL; l = l->next) {
     FbdDevLed *led = l->data;
-    if (led->color == FBD_FEEDBACK_LED_COLOR_RGB || led->color == color)
+    if (fbd_dev_led_has_color (led, color))
       return led;
   }