Update bgraknob.pas minor fix for default property values

Ran into an issue where some property values were not being saved in the .lfm, notably when the min/max values were 0. This made the default values come from the Create method which is only a fall back if not set by the design time props. Set property to 'nodefault' seems to force it to always write. Oddly only happened with the floating point type when the value was 0.

bgraknob.pas

@@ -122,13 +122,13 @@ type
         property PositionMargin : Single read FPositionMargin write SetPositionMargin;
         property PositionType : TBGRAKnobPositionType read FPositionType write SetPositionType;
         property UsePhongLighting : Boolean read FUsePhongLighting write SetUsePhongLighting;
-        property MinValue : Single read FMinValue write SetMinValue;
-        property MaxValue : Single read FMaxValue write SetMaxValue;
+        property MinValue : Single read FMinValue write SetMinValue nodefault;
+        property MaxValue : Single read FMaxValue write SetMaxValue nodefault;
         property StartFromBottom : Boolean read FStartFromBottom write SetStartFromBottom;
-        property StartAngle : Single read FStartAngle write SetStartAngle;
+        property StartAngle : Single read FStartAngle write SetStartAngle nodefault;
         property EndAngle : Single read FEndAngle write SetEndAngle;
         property KnobType : TKnobType read FKnobType write SetKnobType;
-        property Value : Single read GetValue write SetValue;
+        property Value : Single read GetValue write SetValue nodefault;
         property OnValueChanged : TBGRAKnobValueChangedEvent read FOnKnobValueChange write FOnKnobValueChange;
         property WheelSpeed : Byte read FWheelSpeed write SetWheelSpeed;
         property WheelWrap : Boolean read FWheelWrap write FWheelWrap;
@@ -152,7 +152,7 @@ type
 const
     WHEELSPEEDFACTOR = 20.0;  // used to calculate mouse wheel speed
     WHEELSPEEDBASE   = 300;
-    VERSION = 2.00;           // knob version
+    VERSION = 2.01;           // knob version
 
 implementation
 
@@ -826,6 +826,7 @@ begin
     FEndAngle := 330;
     FMinValue := 30;
     FMaxValue := 330;
+    SetValue(30);
 end;
 
 destructor TBGRAKnob.Destroy;