Add FALLTHRU to gimple-ssa-sprintf.c

[Marek Polacek]

Pointed out by Tobias.  This looks like a missing fallthru marker.

Ok?

2016-09-21  Marek Polacek  <pola...@redhat.com>

        * gimple-ssa-sprintf.c (pass_sprintf_length::compute_format_length):
        Add falls through comment.

diff --git gcc/gimple-ssa-sprintf.c gcc/gimple-ssa-sprintf.c
index 0afcf68..dddb026 100644
--- gcc/gimple-ssa-sprintf.c
+++ gcc/gimple-ssa-sprintf.c
@@ -2260,6 +2260,7 @@ pass_sprintf_length::compute_format_length (const 
call_info &info,
        case '\0':
          --pf;
          res->bounded = false;
+         /* FALLTHRU */
        case '%':
          spec.fmtfunc = format_percent;
          break;

        Marek