i#2511 raw2trace: fix bug from refactoring (#2636)
i#2511 raw2trace: fix bug from refactoring (#2636)

Fixes a bug in 66fa2c7 where errors during raw trace file conversion are
silently ignored and success is misleading reported with a truncated output
file.
AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio