whodunnit? info sources now returns duplicates

[Andrew Cagney]

Lets use this to remind ourselves that what we don't test (as in 
gdb/testsuite/) doesn't work.

Andrew

> This is a regression bug -- the version I have tested this are 
> from CVS on 2004-08-17, and 2004-06-22.  
> 
> Any test program:
> 
> foo/test.c
> 
> int main() {
> 	int x;
> }
> 
> now compile - but in the directory above foo.
> 
> gcc -g foo/test.c
> 
> run gdb ./a.out 
> 
> For 20040622, only foo/test.c is listed in info sources (correct)
> For 20040817 (and recent 20040913) foo/test.c and test.c are listed..
> (incorrect)
> 
> When you add a breakpoint to main, and do info sources, the duplicate
> vanishes..