Eliminate unneeded variable

src/c/main.c

@@ -67,7 +67,6 @@ static GRect s_bt_grect_b;
 
 // declare animation templates
 static const uint8_t s_animation_duration = 255;
-static bool s_first_tick_occurred = false;
 static Animation *s_head_raise_template;
 static Animation *s_head_out_template;
 static Animation *s_head_in_template;
@@ -198,7 +197,7 @@ static void minute_handler(struct tm *tick_time, TimeUnits units_changed) {
 		//// calculate new positions
 		s_date_grect_b = GRect(s_ones_offset[ones], s_date_pos_y, s_date_bt_width, s_date_height);
 		s_bt_grect_b = GRect(s_bt_pos_x - s_ones_offset[ones], s_bt_pos_y, s_date_bt_width, s_bt_height);
-		if (s_first_tick_occurred) { // no need to animate before first tick, as positions are set in init() without animating
+		if (units_changed) {
 			//// configure animations
 			////// date
 			PropertyAnimation *date_center_prop = property_animation_create_layer_frame(text_layer_get_layer(s_date_layer), &s_date_grect_a, &s_date_grect_b);
@@ -222,17 +221,15 @@ static void minute_handler(struct tm *tick_time, TimeUnits units_changed) {
 		s_bt_grect_a = s_bt_grect_b;
 	}
 
-	// animate swaps on half-hour boundaries
-	if (!s_first_tick_occurred) {
-		s_first_tick_occurred = true;
-		return; // do not animate part swaps on first tick
-	}
+	// animate swaps on half-hour boundaries (but not on first tick)
+	if (units_changed) {
 		if (tick_time->tm_min % 60 == 0) {
 			schedule_guy_animation(s_head_raise_template, s_head_out_template, s_head_in_template, update_minute_60_out_handler);
 		} else if (tick_time->tm_min % 30 == 0) {
 			schedule_guy_animation(s_butt_raise_template, s_butt_out_template, s_butt_in_template, update_minute_30_out_handler);
 		}
 	}
+}
 
 static void time_bar_update_proc(Layer *layer, GContext *ctx) {
 	graphics_context_set_fill_color(ctx, GColorWhite);