CosmicScansID | Fixed NullPointerException (#5243)

* Fixed NullPointerException when there's no thumbnail

* Apply suggestion

src/id/cosmicscansid/build.gradle

@@ -3,7 +3,7 @@ ext {
     extClass = '.CosmicScansID'
     themePkg = 'mangathemesia'
     baseUrl = 'https://cosmic1.co'
-    overrideVersionCode = 4
+    overrideVersionCode = 5
 }
 
 apply from: "$rootDir/common.gradle"

src/id/cosmicscansid/src/eu/kanade/tachiyomi/extension/id/cosmicscansid/CosmicScansID.kt

@@ -8,6 +8,7 @@ import eu.kanade.tachiyomi.source.model.FilterList
 import okhttp3.HttpUrl.Companion.toHttpUrl
 import okhttp3.OkHttpClient
 import okhttp3.Request
+import org.jsoup.select.Elements
 import java.util.concurrent.TimeUnit
 
 class CosmicScansID : MangaThemesia("CosmicScans.id", "https://cosmic1.co", "id", "/semua-komik") {
@@ -55,6 +56,7 @@ class CosmicScansID : MangaThemesia("CosmicScans.id", "https://cosmic1.co", "id"
 
     // manga details
     override val seriesDescriptionSelector = ".entry-content[itemprop=description] :not(a,p:has(a))"
+    override fun Elements.imgAttr(): String = this.first()?.imgAttr() ?: ""
 
     // pages
     override val pageSelector = "div#readerarea img:not(noscript img)"