File writer doesn't work with placeholders when the output has a directory path

[Tom-Shaw]

OpenLogReplicator/src/writer/WriterFile.cpp

Line 82 in cc363de

if ((prefixPos = this->output.find("%i")) != std::string::npos) {

WriterFile.cpp from line 82 to 133 looks within this->output for placeholders and sets prefixPos and suffixPos accordingly.

However, later on in the file the prefixPos and suffixPos variables are used to index into fileNameMask. This only works if this->output is the same as fileNameMask, i.e. if there is no directory part in the output parameter. If there is a directory part, it doesn't work - it either crashes or fails silently to create and write to the output file.

The fix is to replace this->output with fileNameMask from lines 82 to 133 of WriterFile.cpp.