Debugger bugfix

[John Swensen]

Attached is a changeset to fix a bug I encountered in the debugger.   
The problem was in the bp_table::do_get_breakpoint_list(...) function  
where there is a loop over an STL iterator which calls  
out_of_date_check() in each iteration.  The problem occurred because  
out_of_date_check(), in turn, will call  
remove_all_breakpoints_in_file() when the file has changed, which  
modifies the object STL map being iterated over.

So I added another set of loops to take care of processing out-of-date  
breakpoints before building up the list of breakpoints for dbstatus().

John Swensen

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