[gnome-settings-daemon] media-keys: Add volume step key

[Benjamin Berg <bberg src gnome org>]

commit d50a37563663b5a263157d20047522a904b86e0f
Author: Haxk20 <14281-Haxk20 users noreply gitlab gnome org>
Date:   Mon Jul 22 14:56:00 2019 +0000

    media-keys: Add volume step key
    
    This adds new key so that it the value of the key can be edited with dconf.

 data/org.gnome.settings-daemon.plugins.media-keys.gschema.xml.in | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/data/org.gnome.settings-daemon.plugins.media-keys.gschema.xml.in 
b/data/org.gnome.settings-daemon.plugins.media-keys.gschema.xml.in
index d00b73aa..f835789c 100644
--- a/data/org.gnome.settings-daemon.plugins.media-keys.gschema.xml.in
+++ b/data/org.gnome.settings-daemon.plugins.media-keys.gschema.xml.in
@@ -276,6 +276,12 @@
       <summary>Volume up</summary>
       <description>Binding to raise the volume.</description>
     </key>
+    <key name="volume-step" type="i">
+      <default>6</default>
+      <range min="1" max="20"/>
+      <summary>Size of volume step</summary>
+      <description>Size of the volume step for each volume change</description>
+    </key>
 
     <!-- Change volume without sound effect -->
     <key name="volume-down-quiet" type="as">