fix: call allegro_exit before exit to avoid rare hang seen on linux

Author: connorjclark

src/launcher/launcher.cpp

@@ -256,6 +256,7 @@ int32_t main(int32_t argc, char* argv[])
 	//
 
 	flush_config_file();
+	allegro_exit();
 	return 0;
 }
 END_OF_MAIN()

src/zc/zelda.cpp

@@ -4629,11 +4629,11 @@ int main(int argc, char **argv)
 		Z_message("ZQuest Classic new wiki: https://github.com/ZQuestClassic/ZQuestClassic/wiki\n");
 
 		skipcont = 0;
+		allegro_exit();
 		if(forceExit) //fix for the allegro at_exit() hang.
 			exit(0);
 
 		jit_shutdown();
-		allegro_exit();
 		return 0;
 	}
 
@@ -4767,10 +4767,10 @@ int main(int argc, char **argv)
 		exit_sys_pal();
 		if(ret!=2)
 		{
+			allegro_exit();
 			if(forceExit)
 				exit(0);
 
-			allegro_exit();
 			return 0;
 		}
 	}
@@ -5343,6 +5343,7 @@ int main(int argc, char **argv)
 	skipcont = 0;
 
 	zscript_coloured_console.kill();
+	allegro_exit();
 	if(forceExit) //fix for the allegro at_exit() hang.
 		exit(0);
 

src/zq/zquest.cpp

@@ -26718,6 +26718,7 @@ int32_t main(int32_t argc,char **argv)
 	if(used_switch(argc,argv,"-q"))
 	{
 		Z_message("-q switch used, quitting program.\n");
+		allegro_exit();
 		exit(0);
 	}
 
@@ -26885,6 +26886,7 @@ int32_t main(int32_t argc,char **argv)
 
 	quit_game();
 
+	allegro_exit();
 	if(ForceExit) //last resort fix to the allegro process hanging bug.
 		exit(0);