Fix global search parallelism

app/src/main/java/org/koitharu/kotatsu/search/ui/multi/MultiSearchViewModel.kt

@@ -89,11 +89,10 @@ class MultiSearchViewModel(
 		}
 	}
 
-	private suspend fun searchImpl(q: String) {
+	private suspend fun searchImpl(q: String) = coroutineScope {
 		val sources = settings.getMangaSources(includeHidden = false)
 		val dispatcher = Dispatchers.Default.limitedParallelism(MAX_PARALLELISM)
-		val deferredList = coroutineScope {
+		val deferredList = sources.map { source ->
-			sources.map { source ->
 			async(dispatcher) {
 				runCatching {
 					val list = MangaRepository(source).getList(offset = 0, query = q)
@@ -108,7 +107,7 @@ class MultiSearchViewModel(
 				}
 			}
 		}
-		}
+
 		val errors = ArrayList<Throwable>()
 		for (deferred in deferredList) {
 			deferred.await()
@@ -120,13 +119,12 @@ class MultiSearchViewModel(
 					errors.add(it)
 				}
 		}
-		if (listData.value.isNotEmpty()) {
+		if (listData.value.isEmpty()) {
-			return
-		}
 			when (errors.size) {
 				0 -> Unit
 				1 -> throw errors[0]
 				else -> throw CompositeException(errors)
 			}
 		}
+	}
 }