Correct missing tag

src/main/plugin/iso19139.MERIDIAN/extract-gml.xsl

@@ -71,6 +71,7 @@
               select="$s"/>, <xsl:value-of select="$w"/>,<xsl:value-of select="$s"/>, <xsl:value-of
               select="$w"/>,<xsl:value-of select="$n"/>
             </gml:coordinates>
+		  </gml:LinearRing>
         </gml:exterior>
       </gml:Polygon>
     </xsl:if>