Bug 645777 - Fixed bug involving use of isset() when property_exists() is more appropriate to detect null values.
Bug 645777 - Fixed bug involving use of isset() when property_exists() is more appropriate to detect null values.

git-svn-id: 0429bb2eb6f71f8cd87fe9410a915008a087abca@3054 efcc4bdc-162a-0410-a8af-5b4b46c5376d

Serg09/socorro,mozilla/socorro,twobraids/socorro,AdrianGaudebert/socorro,rhelmer/socorro,luser/socorro,bsmedberg/socorro,rhelmer/socorro,twobraids/socorro,adngdb/socorro,Serg09/socorro,adngdb/socorro,cliqz/socorro,twobraids/socorro,linearregression/socorro,Tayamarn/socorro,Tchanders/socorro,pcabido/socorro,adngdb/socorro,m8ttyB/socorro,m8ttyB/socorro,yglazko/socorro,pcabido/socorro,Tayamarn/socorro,pcabido/socorro,linearregression/socorro,bsmedberg/socorro,spthaolt/socorro,m8ttyB/socorro,yglazko/socorro,twobraids/socorro,Serg09/socorro,rhelmer/socorro,cliqz/socorro,Serg09/socorro,lonnen/socorro,luser/socorro,bsmedberg/socorro,AdrianGaudebert/socorro,Tchanders/socorro,linearregression/socorro,twobraids/socorro,rhelmer/socorro,Tayamarn/socorro,lonnen/socorro,adngdb/socorro,KaiRo-at/socorro,Tayamarn/socorro,pcabido/socorro,cliqz/socorro,mozilla/socorro,linearregression/socorro,spthaolt/socorro,lonnen/socorro,rhelmer/socorro,AdrianGaudebert/socorro,AdrianGaudebert/socorro,KaiRo-at/socorro,yglazko/socorro,Tayamarn/socorro,bsmedberg/socorro,luser/socorro,KaiRo-at/socorro,luser/socorro,m8ttyB/socorro,KaiRo-at/socorro,yglazko/socorro,linearregression/socorro,linearregression/socorro,m8ttyB/socorro,Tchanders/socorro,cliqz/socorro,luser/socorro,Tchanders/socorro,luser/socorro,yglazko/socorro,spthaolt/socorro,KaiRo-at/socorro,bsmedberg/socorro,Serg09/socorro,Tayamarn/socorro,spthaolt/socorro,cliqz/socorro,AdrianGaudebert/socorro,adngdb/socorro,KaiRo-at/socorro,mozilla/socorro,mozilla/socorro,mozilla/socorro,spthaolt/socorro,AdrianGaudebert/socorro,mozilla/socorro,adngdb/socorro,Serg09/socorro,Tchanders/socorro,yglazko/socorro,rhelmer/socorro,Tchanders/socorro,pcabido/socorro,spthaolt/socorro,m8ttyB/socorro,pcabido/socorro,twobraids/socorro,lonnen/socorro,cliqz/socorro