Fix missing result check in Mac exception handler
Patch by Georg Fritzsche <georg.fritzsche@googlemail.com>, R=ted at https://breakpad.appspot.com/554003/

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1152 4c0a9323-5329-0410-9bdc-e9ce6186880e
Add Android ifdef to fix issue 526

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1153 4c0a9323-5329-0410-9bdc-e9ce6186880e