[PATCH] Remove some variables in favor of using gdb::optional

[Tom Tromey]

>>>>> "Simon" == Simon Marchi <simon.marchi@polymtl.ca> writes:

Simon> Yeah, I started doing this, but then thought I would do it as a
Simon> separate patch, changing the
Simon> quick_symbol_functions::lookup_symbol interface, and all it
Simon> impacts.

Ouch, yeah, that makes sense.

Tom