Fix e2425b7: Sprites no longer refreshed if max zoom level changed.

Handle this via AdjustGUIZoom() instead.

src/gfx.cpp

@@ -1980,7 +1980,7 @@ bool AdjustGUIZoom(bool automatic)
 	ZoomLevel old_font_zoom = _font_zoom;
 	int old_scale = _gui_scale;
 	UpdateGUIZoom();
-	if (old_scale == _gui_scale) return false;
+	if (old_scale == _gui_scale && old_gui_zoom == _gui_zoom) return false;
 
 	/* Reload sprites if sprite zoom level has changed. */
 	if (old_gui_zoom != _gui_zoom) {

src/settings_table.cpp

@@ -265,11 +265,7 @@ static void ZoomMinMaxChanged(int32_t)
 {
 	ConstrainAllViewportsZoom();
 	GfxClearSpriteCache();
-	if (_settings_client.gui.zoom_min > _gui_zoom) {
-		/* Restrict GUI zoom if it is no longer available. */
-		_gui_zoom = _settings_client.gui.zoom_min;
-		UpdateCursorSize();
-		LoadStringWidthTable();
+	if (AdjustGUIZoom(false)) {
 		ReInitAllWindows(true);
 	}
 }