Fixed notification app icon pixel size sometimes being zero instead of -1

data/style/style.scss

@@ -16,7 +16,7 @@
   --bg-selected: rgb(0, 128, 255);
 
   --notification-icon-size: 64px;
-  --notification-app-icon-size: var(--notification-icon-size) / 3;
+  --notification-app-icon-size: calc(var(--notification-icon-size) / 3);
   --notification-group-icon-size: 32px;
 }
 

data/ui/notification.blp

@@ -53,7 +53,6 @@ template $SwayNotificationCenterNotification: Box {
                   valign: center;
 
                   child: Image img {
-                    // pixel-size: 48;
                     valign: center;
                     overflow: hidden;
 
@@ -64,7 +63,6 @@ template $SwayNotificationCenterNotification: Box {
 
                   [overlay]
                   Image img_app_icon {
-                    // pixel-size: 48;
                     halign: end;
                     valign: end;
                     overflow: hidden;

src/notification/notification.vala

@@ -695,10 +695,16 @@ namespace SwayNotificationCenter {
             }
 
             int notification_icon_size = ConfigModel.instance.notification_icon_size.clamp (-1, int.MAX);
+            if (notification_icon_size < 1) {
+                notification_icon_size = -1;
+            }
             img.set_pixel_size (notification_icon_size);
             img.height_request = notification_icon_size;
             img.width_request = notification_icon_size;
             int app_icon_size = (notification_icon_size / 3).clamp (-1, int.MAX);
+            if (app_icon_size < 1) {
+                app_icon_size = -1;
+            }
             img_app_icon.set_pixel_size (app_icon_size);
 
             bool img_path_is_theme_icon = false;