Fix PerfLog::get_perf_data()
Fix PerfLog::get_perf_data()

We can no longer directly look up strings in the log.  We'll have to
search for the corresponding character pointers first.

pbauman/libmesh,dschwen/libmesh,hrittich/libmesh,jwpeterson/libmesh,balborian/libmesh,giorgiobornia/libmesh,capitalaslash/libmesh,BalticPinguin/libmesh,balborian/libmesh,dschwen/libmesh,pbauman/libmesh,hrittich/libmesh,jwpeterson/libmesh,pbauman/libmesh,pbauman/libmesh,hrittich/libmesh,hrittich/libmesh,balborian/libmesh,roystgnr/libmesh,90jrong/libmesh,pbauman/libmesh,roystgnr/libmesh,dschwen/libmesh,dschwen/libmesh,jwpeterson/libmesh,90jrong/libmesh,roystgnr/libmesh,capitalaslash/libmesh,jwpeterson/libmesh,libMesh/libmesh,roystgnr/libmesh,libMesh/libmesh,roystgnr/libmesh,libMesh/libmesh,libMesh/libmesh,jwpeterson/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,giorgiobornia/libmesh,pbauman/libmesh,hrittich/libmesh,hrittich/libmesh,BalticPinguin/libmesh,BalticPinguin/libmesh,balborian/libmesh,balborian/libmesh,roystgnr/libmesh,pbauman/libmesh,libMesh/libmesh,capitalaslash/libmesh,BalticPinguin/libmesh,dschwen/libmesh,giorgiobornia/libmesh,BalticPinguin/libmesh,jwpeterson/libmesh,balborian/libmesh,capitalaslash/libmesh,libMesh/libmesh,hrittich/libmesh,balborian/libmesh,libMesh/libmesh,capitalaslash/libmesh,libMesh/libmesh,dschwen/libmesh,balborian/libmesh,giorgiobornia/libmesh,90jrong/libmesh,90jrong/libmesh,BalticPinguin/libmesh,dschwen/libmesh,90jrong/libmesh,pbauman/libmesh,jwpeterson/libmesh,balborian/libmesh,90jrong/libmesh,roystgnr/libmesh,dschwen/libmesh,giorgiobornia/libmesh,hrittich/libmesh,capitalaslash/libmesh,90jrong/libmesh,capitalaslash/libmesh,jwpeterson/libmesh,capitalaslash/libmesh,giorgiobornia/libmesh,giorgiobornia/libmesh,90jrong/libmesh,90jrong/libmesh,hrittich/libmesh,balborian/libmesh,BalticPinguin/libmesh,giorgiobornia/libmesh,pbauman/libmesh,giorgiobornia/libmesh