vlkb overlap: fixes error when less NAXIS defined then WCS keys defined

data-access/engine/src/common/src/ast_frameset.cpp

@@ -927,7 +927,7 @@ overlap_ranges ast::frameset::overlap(coordinates coord)
    for(ix = m_NAXIS; ix < naxes; ix++)
    {
       p1[ix] = 0.5;
-      p2[ix] = 0.5;
+      p2[ix] = 1.5;
    }
 
    AstBox * pixbox = astBox( pixfrm, 1, p1, p2, NULL, " " );