Don't truncate values on import

Leads to off-by-one errors when converting to internal values

Fixes https://gitlab.com/kicad/code/kicad/issues/9827

pcbnew/import_gfx/graphics_importer_pcbnew.cpp

@@ -45,7 +45,7 @@ GRAPHICS_IMPORTER_PCBNEW::GRAPHICS_IMPORTER_PCBNEW()
 wxPoint GRAPHICS_IMPORTER_PCBNEW::MapCoordinate( const VECTOR2D& aCoordinate )
 {
     VECTOR2D coord = ( aCoordinate + GetImportOffsetMM() ) * ImportScalingFactor();
-    return wxPoint( (int) coord.x, (int) coord.y );
+    return wxPoint( KiROUND( coord.x ), KiROUND( coord.y ) );
 }