Fix more compiler warnings/errors

Author: dsn27

CADability.Forms/PaintToOpenGL.cs

@@ -62,9 +62,7 @@ struct state
         Color backgroundColor; // Die Hintergrundfarbe um sicherzustellen, dass nicht mit dieser farbe
                                // gezeichnet wird
         Color selectColor;
-        Color lastColor; // if twice the same color was selected with alpha==0, then this is color override state
         bool colorOverride = false;
-        Color overrideColor;
 
         // Glu.GLUnurbs nurbsRenderer;
         OpenGlList currentList;

CADability.Forms/PropertiesExplorer.cs

@@ -174,7 +174,6 @@ private void ListBox_DrawItem(object sender, DrawItemEventArgs e)
 
         #region textBox
         TextBox textBox; // there is only one TextBox for editing labels or values. It is normally hidden and moved, filled and activated when needed
-        bool endEidtCalled;
         private ErrorProvider errorProvider = new ErrorProvider();
         public void ShowTextBox(Rectangle screenLocation, string initialText, IPropertyEntry sender, Point screenClickPos)
         {