[gnome-shell] magnifier: Simplify some code

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 2546445884d7c01a35775df5b7e22de6f07a176d
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Aug 20 04:10:46 2019 +0200

    magnifier: Simplify some code
    
    We don't need nested if blocks to set or unset the crosshairs'
    clip size.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/731

 js/ui/magnifier.js | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)
---
diff --git a/js/ui/magnifier.js b/js/ui/magnifier.js
index 9d3ad6473c..73522586f3 100644
--- a/js/ui/magnifier.js
+++ b/js/ui/magnifier.js
@@ -451,15 +451,11 @@ var Magnifier = class Magnifier {
      * @clip:   Flag to indicate whether to clip the crosshairs.
      */
     setCrosshairsClip(clip) {
-        if (clip) {
-            if (this._crossHairs)
-                this._crossHairs.setClip(CROSSHAIRS_CLIP_SIZE);
-        } else {
-            // Setting no clipping on crosshairs means a zero sized clip
-            // rectangle.
-            if (this._crossHairs)
-                this._crossHairs.setClip([0, 0]);
-        }
+        if (!this._crossHairs)
+            return;
+
+        // Setting no clipping on crosshairs means a zero sized clip rectangle.
+        this._crossHairs.setClip(clip ? CROSSHAIRS_CLIP_SIZE : [0, 0]);
     }
 
     /**