Option --dump-every-bb now takes a 64bit value on user
request. Update/clarify documentation.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@5806 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/callgrind/threads.c b/callgrind/threads.c
index eda9d0c..9626cd2 100644
--- a/callgrind/threads.c
+++ b/callgrind/threads.c
@@ -182,7 +182,7 @@
 
     if (CLG_(clo).dump_every_bb >0) {
        if (CLG_(stat).bb_executions - bbs_done > CLG_(clo).dump_every_bb) {
-           VG_(sprintf)(buf, "--dump-every-bb=%d", CLG_(clo).dump_every_bb);
+           VG_(sprintf)(buf, "--dump-every-bb=%llu", CLG_(clo).dump_every_bb);
 	   CLG_(dump_profile)(buf, False);
            bbs_done = CLG_(stat).bb_executions;
        }