fixes bug 865481 - CrashPairsByCrashId and report/index with HangID
Merge pull request #327 from peterbe/bug865481-use-of-modelscrashpairsbycrashid-failing-for-report-index-with-hangid-in-raw-data

bug 865481 - CrashPairsByCrashId and report/index with HangID