Don't try to close empty polygon

Fixes #4337
6 years ago · 528ebf8d7d
1 changed files with 4 additions and 1 deletions
--- a/gerbview/rs274d.cpp
+++ b/gerbview/rs274d.cpp
@ -557,7 +557,10 @@ bool GERBER_FILE_IMAGE::Execute_G_Command( char*& text, int G_command )
        if( m_Exposure && GetLastItemInList() )    // End of polygon
        {
            GERBER_DRAW_ITEM * gbritem = GetLastItemInList();
-            gbritem->m_Polygon.Append( gbritem->m_Polygon.CVertex( 0 ) );
+
+            if( gbritem->m_Polygon.VertexCount() )
+                gbritem->m_Polygon.Append( gbritem->m_Polygon.CVertex( 0 ) );
+
            StepAndRepeatItem( *gbritem );
        }
        m_Exposure = false;