isset() to remove warning


git-svn-id: http://observium.org/svn/observer/trunk@4132 61d68cd4-352d-0410-923a-c4978735b2b8
Fix map links (OBSERVIUM-342)


git-svn-id: http://observium.org/svn/observer/trunk@4133 61d68cd4-352d-0410-923a-c4978735b2b8
codestyle change: not working -> working

git-svn-id: http://observium.org/svn/observer/trunk@4134 61d68cd4-352d-0410-923a-c4978735b2b8