Plot SVG: fix issue with arcs (bug #1328155 ) both in Pcbnew and Eeschema.

common/common_plotSVG_functions.cpp

@@ -346,7 +346,7 @@ void SVG_PLOTTER::Arc( const wxPoint& centre, double StAngle, double EndAngle, i
     DPOINT  centre_dev  = userToDeviceCoordinates( centre );
     double  radius_dev  = userToDeviceSize( radius );
 
-    if( m_yaxisReversed )   // Should be always the case
+    if( !m_yaxisReversed )   // Should be never the case
     {
         double tmp  = StAngle;
         StAngle     = -EndAngle;

pcbnew/plot_brditems_plotter.cpp

@@ -394,15 +394,9 @@ void BRDITEMS_PLOTTER::Plot_1_EdgeModule( EDGE_MODULE* aEdge )
     case S_ARC:
     {
         radius = KiROUND( GetLineLength( end, pos ) );
-
         double startAngle  = ArcTangente( end.y - pos.y, end.x - pos.x );
-
         double endAngle = startAngle + aEdge->GetAngle();
 
-        if ( ( GetFormat() == PLOT_FORMAT_DXF ) &&
-             ( m_layerMask & ( SILKSCREEN_LAYER_BACK | DRAW_LAYER | COMMENT_LAYER ) ) )
-            m_plotter->ThickArc( pos, -startAngle, -endAngle, radius, thickness, GetMode() );
-        else
         m_plotter->ThickArc( pos, -endAngle, -startAngle, radius, thickness, GetMode() );
     }
     break;