Fix parse MOTD without favicon

Author: layou233

app/build.gradle.kts

@@ -16,8 +16,8 @@ android {
         applicationId = "com.launium.mcping"
         minSdk = 21
         targetSdk = 34
-        versionCode = 8
-        versionName = "0.3.2"
+        versionCode = 9
+        versionName = "0.3.3"
         setProperty("archivesBaseName", "MCPing-$versionName")
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"

app/src/main/java/com/launium/mcping/server/MinecraftClient.kt

@@ -40,7 +40,7 @@ class MinecraftClient(private val connection: Socket) : Closeable {
         readChannel.readFully(statusArray)
         val statusObject =
             JSON.parse(statusArray, JSONReader.Feature.InitStringFieldAsEmpty) as JSONObject
-        val serverFavicon = statusObject["favicon"] as String
+        val serverFavicon = (statusObject["favicon"] as? String) ?: ""
         var serverDescriptionText = ""
         when (val description = statusObject["description"]) {
             is JSONObject -> {