[RFA] Make insert_breakpoints return void.

[Jim Blandy]

Vladimir Prus <vladimir at codesourcery.com> writes:
> The insert_breakpoints function has 'int' as return
> type, and even tries to return something, but will
> never manage to -- because on the way to returning
> non-zero value it will always through an exception.
> This patch adjust the prototype to match the actual
> behaviour. OK?
>
> - Volodya
>
> 	* breakpoint.h (insert_breakpoints): Change
> 	return type to void.
> 	* breakpoint.c (insert_breakpoints): Change
> 	return type to void.  Rename local return_val
> 	variable to error.
> 	* infrun.c (keep_going): Instead of checking
> 	return value from insert_breakpoints, catch exception.

Looks great.  Please commit.