Fix gcc/MSVC compiler warnings

3rdParty/libzt/CMakeLists.txt

@@ -22,6 +22,7 @@ foreach(
   lwip_obj
   miniupnpc_obj
   zto_pic
+  zt_pic
   natpmp_pic
   lwip_pic
   miniupnpc_pic

Source/engine/path.cpp

@@ -170,7 +170,7 @@ int ReconstructPath(const ExploredNodes &explored, PointT dest, int8_t *path, si
 	}
 	std::reverse(path, path + len);
 	std::fill(path + len, path + maxPathLength, -1);
-	return len;
+	return static_cast<int>(len);
 }
 
 } // namespace

Source/items.cpp

@@ -4271,7 +4271,6 @@ void UseItem(Player &player, item_misc_id mid, SpellID spellID, int spellFrom)
 		if (ControlMode == ControlTypes::KeyboardAndMouse && GetSpellData(spellID).isTargeted()) {
 			prepareSpellID = spellID;
 		} else {
-			const int spellLevel = player.GetSpellLevel(spellID);
 			// Find a valid target for the spell because tile coords
 			// will be validated when processing the network message
 			Point target = cursPosition;