Add ability to compile without game support

Makefile

@@ -13,9 +13,9 @@ LDFLAGS ?=
 LDFLAGS += ${USER_LDFLAGS}
 
 OBJ = autocomplete.o avatars.o bootstrap.o chat.o chat_commands.o configdir.o curl_util.o execute.o
-OBJ += file_transfers.o friendlist.o game_base.o game_centipede.o game_chess.o game_util.o game_snake.o
-OBJ += global_commands.o conference_commands.o conference.o help.o input.o line_info.o log.o message_queue.o
-OBJ += misc_tools.o name_lookup.o notify.o prompt.o qr_code.o settings.o term_mplex.o toxic.o toxic_strings.o windows.o
+OBJ += file_transfers.o friendlist.o global_commands.o conference_commands.o conference.o help.o input.o line_info.o
+OBJ += log.o message_queue.o misc_tools.o name_lookup.o notify.o prompt.o qr_code.o settings.o
+OBJ += term_mplex.o toxic.o toxic_strings.o windows.o
 
 # Check if debug build is enabled
 RELEASE := $(shell if [ -z "$(ENABLE_RELEASE)" ] || [ "$(ENABLE_RELEASE)" = "0" ] ; then echo disabled ; else echo enabled ; fi)