Fixed a crash in the plugin that occurs when the epsg code for a layer cannot be parsed

git-svn-id: http://svn.osgeo.org/qgis/trunk@13262 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: timlinux

python/plugins/mapserver_export/ms_export.py

@@ -623,8 +623,12 @@ def writeMapLayers(self):
 
 
   def getEpsg(self, lyr):
-    srs = lyr.getElementsByTagName('srs')[0].getElementsByTagName('spatialrefsys')[0]
-    return srs.getElementsByTagName('epsg')[0].childNodes[0].nodeValue.encode('utf-8')
+    try:
+      srs = lyr.getElementsByTagName('srs')[0].getElementsByTagName('spatialrefsys')[0]
+      return srs.getElementsByTagName('epsg')[0].childNodes[0].nodeValue.encode('utf-8')
+    except:  
+      #Use 4326 as a sensible default if the above fails
+      return "4326"
 
 
   def getPrimaryKey(self, layerId, tableName):