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-rw-r--r--src/command_func.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/command_func.h b/src/command_func.h
index ea42f25d3..7a6b6d6bb 100644
--- a/src/command_func.h
+++ b/src/command_func.h
@@ -34,10 +34,10 @@ static const CommandCost CMD_ERROR = CommandCost(INVALID_STRING_ID);
*/
#define return_cmd_error(errcode) return CommandCost(errcode);
-CommandCost DoCommand(TileIndex tile, uint32 p1, uint32 p2, DoCommandFlag flags, uint32 cmd, const char *text = NULL);
+CommandCost DoCommand(TileIndex tile, uint32 p1, uint32 p2, DoCommandFlag flags, uint32 cmd, const char *text = nullptr);
CommandCost DoCommand(const CommandContainer *container, DoCommandFlag flags);
-bool DoCommandP(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, CommandCallback *callback = NULL, const char *text = NULL, bool my_cmd = true);
+bool DoCommandP(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, CommandCallback *callback = nullptr, const char *text = nullptr, bool my_cmd = true);
bool DoCommandP(const CommandContainer *container, bool my_cmd = true);
CommandCost DoCommandPInternal(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, CommandCallback *callback, const char *text, bool my_cmd, bool estimate_only);