Author: cazfi
Date: Thu May 18 15:13:21 2017
New Revision: 35646

URL: http://svn.gna.org/viewcvs/freeciv?rev=35646&view=rev
Log:
Make sure unit vision radius is not negative

Reported by David Fernandez (bard)

See hrm Bug #661313

Modified:
    branches/S2_5/server/unittools.c

Modified: branches/S2_5/server/unittools.c
URL: 
http://svn.gna.org/viewcvs/freeciv/branches/S2_5/server/unittools.c?rev=35646&r1=35645&r2=35646&view=diff
==============================================================================
--- branches/S2_5/server/unittools.c    (original)
+++ branches/S2_5/server/unittools.c    Thu May 18 15:13:21 2017
@@ -4164,16 +4164,16 @@
   properly.
 ****************************************************************************/
 int get_unit_vision_at(struct unit *punit, struct tile *ptile,
-                      enum vision_layer vlayer)
+                       enum vision_layer vlayer)
 {
   const int base = (unit_type(punit)->vision_radius_sq
-                   + get_unittype_bonus(unit_owner(punit), ptile, 
unit_type(punit),
-                                        EFT_UNIT_VISION_RADIUS_SQ));
+                    + get_unittype_bonus(unit_owner(punit), ptile, 
unit_type(punit),
+                                         EFT_UNIT_VISION_RADIUS_SQ));
   switch (vlayer) {
   case V_MAIN:
-    return base;
+    return MAX(0, base);
   case V_INVIS:
-    return MIN(base, 2);
+    return CLIP(0, base, 2);
   case V_COUNT:
     break;
   }


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