sesman: add missing break

sesman/libscp/libscp_session.c

@@ -139,10 +139,10 @@ scp_session_set_bpp(struct SCP_SESSION *s, tui8 bpp)
         case 24:
         case 32:
             s->bpp = bpp;
+            break;
         default:
             return 1;
     }
-
     return 0;
 }