diff -r b5c2449616b5 -r 66dde6412125 src/ai/api/ai_testmode.cpp
--- a/src/ai/api/ai_testmode.cpp	Sun Jun 17 21:31:00 2007 +0000
+++ b/src/ai/api/ai_testmode.cpp	Tue Jun 26 23:40:58 2007 +0000
@@ -4,7 +4,7 @@
 
 #include "ai_testmode.hpp"
 
-bool AITestMode::ModeProc(TileIndex tile, uint32 p1, uint32 p2, uint procc, int32 costs)
+bool AITestMode::ModeProc(TileIndex tile, uint32 p1, uint32 p2, uint procc, CommandCost costs)
 {
 	/* In test mode we only return 'false', telling the DoCommand it
 		*  should stop after testing the command and return with that result. */