DBC responces sometimes return XML where not all namespaces are defined.

This if statement checks if the namespace exists as trying to access the array with a not defined namespace will give a PHP notice.

Bug report have been sent to DBC.
Merge remote-tracking branch 'ding2tal/development' into ding2tal
Merge branch 'master' into develop
case 1712 - Helper function for webservice link retrieval.
Merge branch 'case-1712' into develop
Case 2607 - Small changes to allow extension.
Merge remote-tracking branch 'origin/ding2tal' into develop
Merge remote-tracking branch 'origin/case-2607' into develop
Merge remote-tracking branch 'origin/develop'