优化

app/src/main/java/io/legado/app/exception/NoStackTraceException.kt

@@ -6,8 +6,12 @@ package io.legado.app.exception
 open class NoStackTraceException(msg: String) : Exception(msg) {
 
     override fun fillInStackTrace(): Throwable {
-        stackTrace = emptyArray()
+        stackTrace = emptyStackTrace
         return this
     }
 
+    companion object {
+        private val emptyStackTrace = emptyArray<StackTraceElement>()
+    }
+
 }