document native completeBuild function

and remove unneeded params

docs/dev/Lua API.rst

@@ -2178,10 +2178,16 @@ Low-level building creation functions:
 
 * ``dfhack.buildings.getRoomDescription(building[, unit])``
 
-  If the building is a room, returns a description including quality modifiers, e.g. "Royal Bedroom".
-  Otherwise, returns an empty string.
+  If the building is a room, returns a description including quality modifiers,
+  e.g. "Royal Bedroom". Otherwise, returns an empty string.
 
-  The unit argument is passed through to DF and may modify the room's value depending on the unit given.
+  The unit argument is passed through to DF and may modify the room's value
+  depending on the unit given.
+
+* ``dfhack.buildings.completeBuild(building)``
+
+  Complete an unconstructed or partially-constructed building and link it into
+  the world.
 
 High-level
 ~~~~~~~~~~

library/LuaApi.cpp

@@ -2440,7 +2440,7 @@ static const LuaWrapper::FunctionReg dfhack_buildings_module[] = {
     WRAPM(Buildings, isPenPasture),
     WRAPM(Buildings, isPitPond),
     WRAPM(Buildings, isActive),
-    WRAPM(Buildings, completebuild),
+    WRAPM(Buildings, completeBuild),
     { NULL, NULL }
 };
 

library/include/modules/Buildings.h

@@ -293,6 +293,6 @@ DFHACK_EXPORT bool getCageOccupants(df::building_cagest *cage, std::vector<df::u
 /**
  * Finalizes a new building into the world
  */
-DFHACK_EXPORT void completebuild(df::building* bld, char in_play);
+DFHACK_EXPORT void completeBuild(df::building* bld);
 }
 }

library/modules/Buildings.cpp

@@ -1708,13 +1708,16 @@ bool Buildings::getCageOccupants(df::building_cagest *cage, vector<df::unit*> &u
     return true;
 }
 
-void Buildings::completebuild(df::building* bld, char in_play)
+void Buildings::completeBuild(df::building* bld)
 {
     CHECK_NULL_POINTER(bld);
 
     auto fp = df::global::buildingst_completebuild;
     CHECK_NULL_POINTER(fp);
 
+    // whether to add to the IN_PLAY vector, which we always want to do
+    char in_play = 1;
+
     using FT = std::function<void(df::building* bld, char)>;
     auto f = reinterpret_cast<FT*>(fp);
     (*f)(bld, in_play);