pcbnew: correctly display edgecut polygons in modules

Commit 1858b7dca corrected the handling of polygons on the edge cut
layer for board items.  This adjusts for the possibility of polygons
in modules on the edge cut layer by applying the module offset/rotation
to the polygon elements.

pcbnew/plot_brditems_plotter.cpp

@@ -534,7 +534,22 @@ void BRDITEMS_PLOTTER::Plot_1_EdgeModule( EDGE_MODULE* aEdge )
                 cornerList.push_back( corner );
             }
 
-            m_plotter->PlotPoly( cornerList, FILLED_SHAPE, thickness, &gbr_metadata );
+            if( m_layerMask[ Edge_Cuts ] )
+            {
+                for( size_t i = 1; i < cornerList.size(); i++ )
+                {
+                    m_plotter->ThickSegment( cornerList[i-1], cornerList[i],
+                            thickness, GetPlotMode(), &gbr_metadata );
+                }
+
+                m_plotter->ThickSegment( cornerList.back(), cornerList.front(),
+                        thickness, GetPlotMode(), &gbr_metadata );
+
+            }
+            else
+            {
+                m_plotter->PlotPoly( cornerList, FILLED_SHAPE, thickness, &gbr_metadata );
+            }
         }
     break;
     }