Fix 3 uninitialized variable uses

src/widgets/KeyView.cpp

@@ -97,6 +97,9 @@ KeyView::KeyView(wxWindow *parent,
 
    // The default view
    mViewType = ViewByTree;
+
+   // Calculate measurements used for columns and scrolling
+   RecalcExtents();
 }
 
 KeyView::~KeyView()

src/widgets/NumericTextCtrl.cpp

@@ -565,9 +565,11 @@ NumericConverter::NumericConverter(Type type,
 
    mFocusedDigit = 0;
 
+   mValue = value; // used in SetSampleRate, reassigned later
+
    SetSampleRate(sampleRate);
    SetFormatName(formatName);
-   SetValue(value);
+   SetValue(value); // mValue got overridden to -1 in ControlsToValue(), reassign
 }
 
 void NumericConverter::ParseFormatString( const wxString & format)