Update STTextViewController.swift

Author: thecoolwinter

Sources/CodeEditTextView/STTextViewController.swift

@@ -17,8 +17,6 @@ public class STTextViewController: NSViewController, STTextViewDelegate, ThemeAt
 
     internal var textView: STTextView!
 
-    internal var scrollView: NSScrollView!
-
     internal var rulerView: STLineNumberRulerView!
 
     /// Binding for the `textView`s string
@@ -87,7 +85,7 @@ public class STTextViewController: NSViewController, STTextViewDelegate, ThemeAt
     public override func loadView() {
         textView = STTextView()
 
-        scrollView = NSScrollView()
+        let scrollView = NSScrollView()
         scrollView.translatesAutoresizingMaskIntoConstraints = false
         scrollView.hasVerticalScroller = true
         scrollView.documentView = textView
@@ -213,8 +211,7 @@ public class STTextViewController: NSViewController, STTextViewDelegate, ThemeAt
         rulerView?.separatorColor = theme.invisibles
         rulerView?.baselineOffset = baselineOffset
 
-        scrollView?.backgroundColor = theme.background
-
+        (view as? NSScrollView)?.backgroundColor = theme.background
         (view as? NSScrollView)?.contentView.contentInsets.bottom = bottomContentInsets
 
         setStandardAttributes()