Index: sources/gui/qml/components/RangedValue.qml
===================================================================
diff -u -ra3c7ec36bfb8189f4ee82626a29561f7563513b3 -r41a18f001483e96ccd4b08629b9f1e0ae20f3547
--- sources/gui/qml/components/RangedValue.qml	(.../RangedValue.qml)	(revision a3c7ec36bfb8189f4ee82626a29561f7563513b3)
+++ sources/gui/qml/components/RangedValue.qml	(.../RangedValue.qml)	(revision 41a18f001483e96ccd4b08629b9f1e0ae20f3547)
@@ -29,7 +29,7 @@
     readonly property bool canDecrement     : canOff ? value > 0 : value > _private.calculateMinimum()
 
     property int  precision : 0
-    property real rawValue  : undefined
+    property real rawValue  : 0
     property real rawMin    : rawValue
     property real rawMax    : rawValue
     property real rawStep   : 1