gml string crashes server

[pramsey]

This ticket holds the 1.5 implications of #1936

select st_astext(st_geomfromgml(
    '<gml:Polygon xmlns:gml="http://www.opengis.net/gml/3.2" 
    gml:id="HPA.15449990010" srsName="urn:ogc:def:crs:EPSG::2065" 
    srsDimension="2">
    <gml:exterior><gml:Ring>
    <gml:curveMember><gml:LineString gml:id="HPA.15449990010.1"><gml:posList>711540.35 1070163.61 711523.82 1070166.54 711521.30 1070164.14 711519.52 1070162.44 711518.57 1070164.62 712154.47 1070824.94</gml:posList></gml:LineString></gml:curveMember><gml:curveMember><gml:Curve gml:id="HPA.15449990010.2"><gml:segments><gml:ArcString><gml:posList>712154.47 1070824.94 712154.98 1070826.04 712154.41 1070827.22</gml:posList></gml:ArcString></gml:segments></gml:Curve></gml:curveMember><gml:curveMember><gml:LineString gml:id="HPA.15449990010.3"><gml:posList>712154.41 1070827.22 712160.31 1070837.07 712160.92 1070835.36 712207.89 1071007.95</gml:posList></gml:LineString></gml:curveMember><gml:curveMember><gml:Curve gml:id="HPA.15449990010.4"><gml:segments><gml:ArcString><gml:posList>712207.89 1071007.95 712207.48 1071005.59 712208.38 1071001.28</gml:posList></gml:ArcString></gml:segments></gml:Curve></gml:curveMember><gml:curveMember><gml:LineString gml:id="HPA.15449990010.5"><gml:posList>712208.38 1071001.28 712228.74 1070949.67 712233.98 1070936.15 712124.93 1070788.72</gml:posList></gml:LineString></gml:curveMember><gml:curveMember><gml:Curve gml:id="HPA.15449990010.6"><gml:segments><gml:ArcString><gml:posList>712124.93 1070788.72 712124.28 1070785.87 712124.63 1070783.38</gml:posList></gml:ArcString></gml:segments></gml:Curve></gml:curveMember><gml:curveMember><gml:LineString gml:id="HPA.15449990010.7"><gml:posList>712124.63 1070783.38 712141.04 1070764.12 712146.60 1070757.01 711540.35 1070163.61</gml:posList></gml:LineString></gml:curveMember></gml:Ring></gml:exterior><gml:interior><gml:LinearRing><gml:posList>713061.62 1070354.46 713053.59 1070335.12 713049.58 1070315.92 713049.65 1070298.33 713061.62 1070354.46</gml:posList></gml:LinearRing></gml:interior></gml:Polygon>'));

[pramsey]

Fix committed to 1.5 at r10254