[PATCH] fix possible double fclose

=== modified file 'src/newsrc.c'
--- src/newsrc.c	2011-01-25 19:04:15 +0000
+++ src/newsrc.c	2011-04-16 23:48:41 +0000
@@ -1193,6 +1193,7 @@
 	t_bool ret_code = FALSE;
 	t_bool sub_created = FALSE;
 	t_bool unsub_created = FALSE;
+	t_bool fs_error = FALSE;
 
 	if (no_write)
 		goto rewrite_group_done;
@@ -1250,21 +1251,22 @@
 			clearerr(fp_sub);
 			fclose(fp_sub);
 		}
-		fp_sub = NULL;
+		fs_error = TRUE;
 	}
 	if ((err = ferror(fp_unsub)) || fclose(fp_unsub)) {
-		if (fp_sub) /* didn't see and error above */
+		if (!fs_error) /* avoid repeatd error message */
 			error_message(2, _(txt_filesystem_full), NEWSRC_FILE);
 		if (err) {
 			clearerr(fp_unsub);
 			fclose(fp_unsub);
 		}
-		fp_unsub = NULL;
+		fs_error = TRUE;
 	}
-	if (fp_sub == NULL || fp_unsub == NULL)
-		goto rewrite_group_done;
-
 	fp_sub = fp_unsub = NULL;
+
+	if (fs_error)
+		goto rewrite_group_done;
+
 	fclose(fp_in);
 	fp_in = NULL;