Comment 1 for bug 1734544

I tried to fix this and did the following change which removed the Valgrind message.

=== modified file 'src/ai/defaultai.cc'
--- src/ai/defaultai.cc 2017-11-20 07:54:19 +0000
+++ src/ai/defaultai.cc 2017-11-26 15:21:25 +0000
@@ -106,6 +106,7 @@
      ts_in_const_count_(0),
      ts_without_trainers_(0),
      inhibit_road_building_(0),
+ enemysites_check_delay_(30),
      resource_necessity_water_needed_(false),
      highest_nonmil_prio_(0),
      seafaring_economy(false),