Bezier2Poly refactor

Before the refactor library browser display Bezier curves correctly only
once, at other times they were just straight lines or crashed the
application.

common/gr_basic.cpp

@@ -1233,8 +1233,12 @@ void GRBezier( EDA_RECT* ClipBox,
                int       width,
                COLOR4D   Color )
 {
-    std::vector<wxPoint> Points = Bezier2Poly( x1, y1, x2, y2, x3, y3 );
-    GRPoly( ClipBox, DC, Points.size(), &Points[0], false, width, Color, Color );
+    std::vector<wxPoint> points;
+
+    BEZIER_POLY converter( x1, y1, x2, y2, x3, y3 );
+    converter.GetPoly( points );
+
+    GRPoly( ClipBox, DC, points.size(), &points[0], false, width, Color, Color );
 }
 
 
@@ -1251,8 +1255,12 @@ void GRBezier( EDA_RECT* ClipBox,
                int       width,
                COLOR4D   Color )
 {
-    std::vector<wxPoint> Points = Bezier2Poly( x1, y1, x2, y2, x3, y3, x4, y4 );
-    GRPoly( ClipBox, DC, Points.size(), &Points[0], false, width, Color, Color );
+    std::vector<wxPoint> points;
+
+    BEZIER_POLY converter( x1, y1, x2, y2, x3, y3, x4, y4 );
+    converter.GetPoly( points );
+
+    GRPoly( ClipBox, DC, points.size(), &points[0], false, width, Color, Color );
 }