[gnome-sound-recorder] keep variables in function only scope

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit 577e8a19527e1adfb2e376a94501d4cdb8e87423
Author: Kavan Mevada <kavanmevada gmail com>
Date:   Sat Jun 6 11:43:55 2020 +0530

    keep variables in function only scope

 src/recorder.js | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)
---
diff --git a/src/recorder.js b/src/recorder.js
index 23c09e1..ae5b2d2 100644
--- a/src/recorder.js
+++ b/src/recorder.js
@@ -176,25 +176,26 @@ var Recorder = new GObject.registerClass({
                         if (val > 0)
                             val = 0;
 
-                        this.peak = Math.pow(10, val / 20);
+                        const peak = Math.pow(10, val / 20);
 
 
                         if  (this.clock === null)
                             this.clock = this.pipeline.get_clock();
 
+                        let absoluteTime;
                         try {
-                            this.absoluteTime = this.clock.get_time();
+                            absoluteTime = this.clock.get_time();
                         } catch (error) {
-                            this.absoluteTime = 0;
+                            absoluteTime = 0;
                         }
 
 
                         if (this.baseTime === 0)
-                            this.baseTime = this.absoluteTime;
+                            this.baseTime = absoluteTime;
 
-                        this.runTime = this.absoluteTime - this.baseTime;
-                        let approxTime = Math.round(this.runTime / 100000000);
-                        this.emit('waveform', approxTime, this.peak);
+                        const runTime = absoluteTime - this.baseTime;
+                        let approxTime = Math.round(runTime / 100000000);
+                        this.emit('waveform', approxTime, peak);
                     }
                 }
             }