[Bug c/7652] -Wswitch-break : Warn if a switch case falls through

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=7652

--- Comment #34 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
In any case, the current patch needs more work. In case you want to see this in
GCC 5.0, you need to hurry up! :)