Set null safety on favorite server item's icon for resource not found error

app/src/main/java/com/vpn/fastestvpnservice/customItems/ServerItem.kt

@@ -303,20 +303,22 @@ fun FavoriteServerItem(
             val icon = if (server.enable == 1) Utils.getDrawable(context, server.iso)
             else Utils.getDrawableGray(context, server.iso)
 
-            Icon(
-                painter = painterResource(id = icon),
-                contentDescription = "Server Logo",
-                tint = Color.Unspecified,
-                modifier = Modifier
-                    .padding(bottom = 16.dp)
-                    .size(24.dp)
-                    .clip(CircleShape)
-                    .border(1.dp, colorResource(id = R.color.gray_opac_04), CircleShape)
-                    .paint(
-                        painter = painterResource(id = icon),
-                        contentScale = ContentScale.FillBounds
-                    )
-            )
+            if (icon != 0) {
+                Icon(
+                    painter = painterResource(id = icon),
+                    contentDescription = "Server Logo",
+                    tint = Color.Unspecified,
+                    modifier = Modifier
+                        .padding(bottom = 16.dp)
+                        .size(24.dp)
+                        .clip(CircleShape)
+                        .border(1.dp, colorResource(id = R.color.gray_opac_04), CircleShape)
+                        .paint(
+                            painter = painterResource(id = icon),
+                            contentScale = ContentScale.FillBounds
+                        )
+                )
+            }
 
             Text(text = server.server_name!!,
                 color = MaterialTheme.colorScheme.primary,