fix implicit fallthrough spelling

This commit fixes the syntax of the implicit fallthrough comments, in
order to be matched by GCC (and probably other compilers as well) with
the following regular expression:

[ \t.!]*([Ee]lse,? |[Ii]ntentional(ly)? )? fall(s | |-)?thr(ough|u)[
\t.!]*(-[^\n\r]*)?

See: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wimplicit-fallthrough=

1 files changed, 2 insertions, 2 deletions

diff --git a/proxy.c b/proxy.c
index 640958a..619b08a 100644
--- a/proxy.c
+++ b/proxy.c
@@ -171,8 +171,8 @@ size_t remove_peer_from_torrent_proxy( ot_hash hash, ot_peer *peer ) {
   if( exactmatch ) {
     ot_peerlist *peer_list = torrent->peer_list;
     switch( vector_remove_peer( &peer_list->peers, peer ) ) {
-      case 2:  peer_list->seed_count--; /* Fall throughs intended */
-      case 1:  peer_list->peer_count--; /* Fall throughs intended */
+      case 2:  peer_list->seed_count--; /* Intentional fallthrough */
+      case 1:  peer_list->peer_count--; /* Intentional fallthrough */
       default: break;
     }
   }