Use-after-frees

Hi folks!

I tried clang-static-analyzer on irssi 1.1.1, it seems like it
finds some things. Here's a diff, but there might be more that you would
want to check, or choose to work differently.

(in special-vars.c, ret is commands->data sometime)

I hope it's not too much trouble if reported as a confidential bug.
Thanks.

src/core/modules.c

@@ -289,8 +289,9 @@ void modules_deinit(void)
 
 	while (list != NULL) {
 		module_uniq_destroy(list->data);
-		g_free(list->data);
+		gconstpointer tmp = list->data;
 		list = g_slist_remove(list, list->data);
+		g_free(tmp);
 	}
 
 	g_hash_table_destroy(idlookup);

src/core/rawlog.c

@@ -64,9 +64,10 @@ static void rawlog_add(RAWLOG_REC *rawlog, char *str)
 	if (rawlog->nlines < rawlog_lines || rawlog_lines <= 2)
 		rawlog->nlines++;
 	else {
-		g_free(rawlog->lines->data);
+		gconstpointer tmp = rawlog->lines->data;
 		rawlog->lines = g_slist_remove(rawlog->lines,
 					       rawlog->lines->data);
+		g_free(tmp);
 	}
 
 	if (rawlog->logging) {

src/core/special-vars.c

@@ -620,8 +620,8 @@ void eval_special_string(const char *cmd, const char *data,
 		/* FIXME: window item would need reference counting as well,
 		   eg. "/EVAL win close;say hello" wouldn't work now.. */
 
-		g_free(ret);
 		commands = g_slist_remove(commands, commands->data);
+		g_free(ret);
 	}
 	g_free(orig);
 }