[PUSHED/OBVIOUS] Re-fix leak in source.c (open_source_file).

[Tom Tromey]

>>>>> "Philippe" == Philippe Waroquiers <philippe.waroquiers@skynet.be> writes:

Philippe> Note that after having run all GDB tests under valgrind, I still
Philippe> see some 4K leaks in open_source_file appearing (I suspect)
Philippe> when GDB reloads an executable that has changed.

What are the leaks?  I wonder if the "fullname"s in the psymtabs aren't
being freed.

I have been wondering lately if this field should be pulled out into
some separate hash table.  This would save a little memory if there are
file names, which seems likely.

Tom