test/test_snap_mapper.cc: prefer prefix ++operator for iterators

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/test/test_snap_mapper.cc b/src/test/test_snap_mapper.cc
index db58c685b11..a3b250052ef 100644
--- a/src/test/test_snap_mapper.cc
+++ b/src/test/test_snap_mapper.cc
@@ -25,7 +25,7 @@ typename T::iterator rand_choose(T &cont) {
   int index = rand() % cont.size();
   typename T::iterator retval = cont.begin();
 
-  for (; index > 0; --index) retval++;
+  for (; index > 0; --index) ++retval;
   return retval;
 }