[Freeciv-Dev] (PR#9780) server crash from unset tech

["Per I. Mathisen" <per@xxxxxxxxxxx>]

<URL: http://rt.freeciv.org/Ticket/Display.html?id=9780 >

Patch.

  - Per

Index: server/unittools.c
===================================================================
RCS file: /home/freeciv/CVS/freeciv/server/unittools.c,v
retrieving revision 1.304
diff -u -r1.304 unittools.c
--- server/unittools.c  22 Sep 2004 07:17:57 -0000      1.304
+++ server/unittools.c  23 Sep 2004 19:38:07 -0000
@@ -2288,7 +2288,9 @@
   new_tech = pplayer->research.researching;
   
   pplayer->research.bulbs_researched = res_ed;
-  pplayer->research.researching = res_ing;
+  if (res_ing != A_UNSET) {
+    pplayer->research.researching = res_ing;
+  }
 
   tech_name = get_tech_name(pplayer, new_tech);
   notify_player_ex(pplayer, punit->x, punit->y, E_HUT_TECH,